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REVIEW 3 major objections 6 minor 42 references

A Novel Low-Background Photomultiplier Tube Developed for Xenon Based Detectors

T0 review · 3 major / 6 minor · reviewed 2026-08-11 · deepseek-v4-flash

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Pith's one-line read The R12699 photomultiplier tube cuts per-tube radioactivity by more than 15-fold through two material substitutions, while keeping full gain at liquid xenon temperature.

desk verdict A genuinely useful radiopure PMT with credible absolute activity numbers, but the headline '15-fold reduction' overstates the data because it divides measured values by upper limits. read the letter →

arxiv 2412.10830 v2 pith:E2NDJBJE submitted 2024-12-14 physics.ins-det hep-ex

Youhui Yun , Zhizhen Zhou , Baoguo An , Zhixing Gao , Ke Han , Jianglai Liu , Yuanzi Liang , Yang Liu
show 17 more authors
Yue Meng Zhicheng Qian Xiaofeng Shang Lin Si Ziyan Song Hao Wang Mingxin Wang Shaobo Wang Liangyu Wu Weihao Wu Yuan Wu Binbin Yan Xiyu Yan Zhe Yuan Tao Zhang Qiang Zhao Xinning Zeng
This is my paper · ORCID
classification physics.ins-dethep-ex
keywords photomultipliertubeliquidxenondetectorlowradioactivityradiopurityscreeningcryogenicPMTperformancedarkmattersearchradonemanationsurface210Poalphaactivity
verification ladder T0 review T1 audit T2 compute T3 formal

The pith

A machine-rendered reading of the paper's core claim, the machinery that carries it, and where it could break.

The reading

To make next-generation multi-ten-tonne liquid xenon detectors sensitive to dark matter and neutrinoless double $\beta$ decay, the photomultiplier tubes that read the xenon scintillation light must themselves contribute almost no radioactivity. This paper claims the newly developed R12699 PMT achieves that by replacing two radioactive components: the Kovar metal parts (an iron-cobalt-nickel alloy) with an iron-nickel alloy, and the high-radioactivity sealing glass with a specially selected low-background glass melted in a platinum crucible. High-purity germanium measurements give about $0.08$ mBq/PMT of $^{60}$Co and $0.06$ mBq/PMT of $^{238}$U late-chain activity, more than 15 times lower than the R11410 PMTs used in PandaX-4T, with radon emanation below $3.2~\mu$Bq/PMT. The same tube keeps an average gain of $4.23\times10^{6}$ and a dark count rate of $2.5$ Hz per channel at $-100\,^{\circ}\mathrm{C}$, so the low background does not come at the cost of cryogenic electrical performance.

What carries the argument

The load-bearing mechanism is the replacement of two specific materials inside the PMT: Kovar, an iron-cobalt-nickel alloy whose neutron-activated $^{60}$Co dominated the gamma background, is swapped for an iron-nickel alloy, and the high-radioactivity sealing glass (Glass-1) is swapped for a low-background glass made from selected raw materials and melted in a platinum crucible to avoid recontamination. The quantitative engine is the high-purity germanium screening campaign at a deep underground laboratory, with detection efficiencies computed by the Monte Carlo simulation program the paper uses, which traces each decay chain ($^{60}$Co, $^{238}$U early/late, $^{232}$Th early/late, $^{40}$K, $^{137}$Cs, $^{235}$U) to specific PMT parts. A second element is the optimized voltage divider ratio, which increases the dynode-stage gain by about 30% while lowering the cathode-to-first-dynode voltage only slightly, with less than 5% loss in electron collection efficiency.

What would settle it

Place an assembled R12699 PMT window in an $\alpha$ spectrometer with sensitivity below $1~\mu$Bq/cm$^2$ and count $^{210}$Po decays over several weeks; if the measured surface activity exceeds $18.4~\mu$Bq/cm$^2$, the paper's surface-radioactivity claim is contradicted for the actual device.

Watch

Extended reading notes

Core claim

The central claim is that the R12699-406-M4 PMT, a 2-inch square quartz-windowed tube with four independent detection channels in one body, reaches radioactivity levels low enough for next-generation liquid xenon detectors without sacrificing cryogenic operation. The active steps are material substitutions: replacing the Kovar plate, pin, and pipe with a new iron-nickel alloy brings $^{60}$Co from roughly $0.66$ mBq/PMT in the original v0 tube down to about $0.08$ mBq/PMT in the final v2 version, and replacing the sealing glass (Glass-1) brings $^{238}$U late-chain activity down to $0.06$ mBq/PMT and $^{232}$Th late-chain activity to $0.09$ mBq/PMT. The paper also reports an optimized voltage divider that raises the gain by about 30% compared with the manufacturer's recommended ratio. On a batch of 54 PMTs (216 channels), the average gain is $(4.23\pm1.37)\times10^{6}$ at $-1000$ V and $-100\,^{\circ}\mathrm{C}$, the average dark count rate is $(2.5\pm0.9)$ Hz per channel, and the average after-pulse probability is $0.5\%$, with $^{40}$K identified as the remaining radioactivity to be addressed in future work.

Load-bearing premise

The surface $^{210}$Po claim is measured on a quartz witness sample, not on a fully assembled PMT, so the surface-radioactivity argument assumes the cleaning procedure removes $^{210}$Po from the real tube window just as it did from the sample.

Editorial extensions

If this is right

  • If the R12699's radioactivity holds in mass production, next-generation multi-ten-tonne liquid xenon detectors can install denser photocathode coverage with a lower PMT-induced background than current R11410-based detectors.
  • The 15-fold reduction in $^{60}$Co and $^{238}$U(l) per tube directly shrinks the gamma background in the dark matter and neutrinoless-double-beta regions of interest.
  • The radon emanation rate below $3.2~\mu$Bq/PMT and surface $^{210}$Po below $18.4~\mu$Bq/cm$^2$ remove two background paths that can mimic low-energy nuclear recoils.
  • At $-100\,^{\circ}\mathrm{C}$ the average gain of $4.23\times10^{6}$, dark count rate of $2.5$ Hz per channel, and after-pulse probability of $0.5\%$ are comparable to or better than the R11410 values quoted for existing detectors, so the low-background design does not require a new readout threshold.
  • The four-channel-per-tube format and 30% gain improvement from the optimized divider mean the same number of readout channels can be packed in a smaller radioactive footprint.

Reading between the lines

Editorial extensions of the paper, not claims the author makes directly.

  • A direct alpha assay of fully assembled R12699 windows, rather than quartz witness samples, would settle whether the cleaning procedure's $^{210}$Po removal transfers to production tubes.
  • The optimized divider lowers the cathode-to-first-dynode voltage from 160 V to 120 V; a dedicated VUV quantum-efficiency scan at the 178 nm xenon line would confirm that single-photon response is not degraded beyond the reported $<5\%$ collection-efficiency change.
  • Because four channels share one tube envelope, a single PMT failure would remove four channels at once, so next-generation detector designs would need correlated-failure modeling rather than treating channels as independent.
  • The remaining $^{40}$K in the photocathode is the obvious next lever; if a $^{39}$K-enriched photocathode works at 178 nm, R12699's radioactivity would approach the silicon-photomultiplier level without changing the rest of the tube.
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Editorial analysis

A structured set of objections, weighed in public.

Desk editor's note, referee report, and a circularity audit.

Referee Report

3 major / 6 minor

Summary. The paper reports the development and characterization of the R12699-406-M4 photomultiplier tube, a four-channel 2-inch square PMT produced jointly by the PandaX collaboration and Hamamatsu. The authors describe the iterative replacement of two radio-contaminated components (Kovar and a sealing glass), and present HPGe screening results for the bulk materials, radon emanation measurements, and surface 210Po cleaning tests. They also describe a cryogenic test setup and give electrical results for a batch of 54 PMTs: an average gain of 4.23×10^6 at -1000 V and -100 °C, a dark count rate of 2.5 Hz per channel, and an after-pulse probability of 0.5%. The central claims are that the R12699 achieves a roughly 15-fold radioactivity reduction compared with the R11410 used in PandaX-4T, and that it combines low background with robust cryogenic performance.

Significance. If the quantitative claims are appropriately revised, this is a valuable engineering result for next-generation liquid xenon detectors. The paper provides a detailed material screening of individual PMT components, a clear demonstration that replacing Kovar and sealing glass reduces the dominant 60Co and 238U(l) contributions, and a statistically meaningful characterization of 216 channels from 54 PMTs. The reported absolute v2 activities for 60Co (~0.08 mBq/PMT) and the cryogenic gain and DCR results are useful inputs for background modelers. The work is reproducible in the sense that the screening methods, the charge-spectrum fit function, and the test procedures are described in enough detail to allow independent verification. The main weaknesses are in the interpretation of upper limits and in the surface-cleaning extrapolation, which currently overstate the low-background claim.

major comments (3)
  1. [Abstract, Table 5, Section 5] The headline claim of a '15-fold reduction compared to R11410 PMT used in PandaX-4T' is not supported by the data shown. In Table 5, the R11410-23 (PandaX-4T) entries for 60Co, 232Th(l), and 238U(l) are upper limits (<0.073, <0.095, <0.12 mBq/cm2), while the R12699 v2 entries are measured values (0.004(1), 0.004(1), 0.003(1) mBq/cm2). Dividing a measured value by an upper limit yields a one-sided bound on the ratio, not a lower bound on the actual reduction factor. The true R11410-23 activities could be substantially below the quoted limits, so the actual reduction factor is unknown; the wording should be changed to 'lower than the R11410-23 upper limit by a factor of at least 15' or supported by measured (not limit) values from Ref. [34].
  2. [Table 4, Section 2.1] The v2 average for 238U(l) is listed as 0.06(2) mBq/PMT, but the individual v2 entries are 0.10(3), <0.11, <0.08, and <0.17 mBq/PMT. Averaging a single measured value with three upper limits as if they were measurements is statistically invalid; it biases the average downward and underestimates the uncertainty. The same issue affects the v2 232Th(l) average (0.09(3) from 0.17(5) and three upper limits). The authors should report per-batch limits separately, use a proper combined upper-limit analysis, or present a conservative upper limit instead of a claimed measured value. This affects the central low-background claim for 238U(l).
  3. [Section 2.3, Table 7, Abstract] The abstract and Section 5 state that the surface 210Po activity is less than 18.4 µBq/cm2, but the cleaning verification in Table 7 shows that the initial quartz sample has <18.4 µBq/cm2, whereas after the first cleaning the activity is 27.8±8.1 µBq/cm2 and after the second cleaning it is <22.5 µBq/cm2. Thus the claimed upper limit corresponds to the uncleaned sample, not to the cleaned PMT surface. Moreover, the measurement is on a quartz sample, not on an assembled PMT, so the transfer of the cleaning procedure to the actual PMT window is an assumption. The surface-radioactivity claim should be corrected to reflect the post-cleaning values, or the limitation should be explicitly acknowledged.
minor comments (6)
  1. [Section 2.2, Table 6] The radon emanation upper limits in Table 6 are not assigned a confidence level in the text, although the abstract quotes a 90% confidence level. Please state the confidence level used for all limits in Table 6 and briefly describe how the limits were computed.
  2. [Section 4.1, fit function] In the charge-spectrum fit function, the notation 'iσ1^2' in the denominator of the double-PE Gaussian is ambiguous: it could mean the index i multiplied by σ1^2 or an indexing error. Please clarify the expression, e.g., write (i σ1^2 + σ0^2) explicitly with a definition of i.
  3. [Table 9] The two rightmost columns of Table 9 are labeled 'Avg gain (optimized distribution ratio)' and 'Avg gain (original distribution ratio)', but the text says the optimization improved the gain; the numbers in the table appear to be consistent with that, yet the column order could be confused. Please verify that the labels match the data.
  4. [Figure 3] The y-axis label 'Counts/(5 keV s)' in the right panel of Figure 3 appears to lack a clear normalization; if the spectra are normalized per second or per 5 keV bin, the axis title should state this explicitly.
  5. [Section 5, Table 10] When comparing DCR per unit area in Table 10, the R12699 has four independent channels within a 56 mm square footprint; it may be helpful to state how the per-channel and per-area normalization is defined so that the comparison with the R11410 is unambiguous.
  6. [References] Reference [30] is an untitled URL; please provide a full bibliographic entry, including a collaboration name and year, or cite a published equivalent.

Circularity Check

0 steps flagged · score 0.0 of 10

No significant circularity found; the paper reports direct measurements with external benchmarks, and the headline comparison is a statistical wording concern, not a circular derivation.

full rationale

The paper's central claims are direct measurements rather than derivations from fitted parameters. The R12699 PMT activities in Table 4 are measured averages of HPGe screening of PMT batches; the radon emanation rates are measured or quoted as upper limits; the surface 210Po activity is measured on a quartz sample; and the gain, dark count rate, and after-pulse probability come from cryogenic charge-spectrum fits and counting measurements. The charge-spectrum fit parameters (n0, mu1, sigma1, etc.) are standard extraction tools for the gain and are not reused as inputs elsewhere. The '15-fold reduction' comparison to the R11410-23 used in PandaX-4T relies on published screening values from Ref. [34]; even if one objects that the R11410-23 entries are upper limits and that dividing measured values by upper limits does not establish a lower bound on the true reduction factor, this is a statistical or interpretational concern, not a circularity in which the conclusion is equivalent to its input by construction. The self-citations present in the paper are used for experimental context, benchmark comparisons, and prior material-screening infrastructure, but they are not invoked to forbid alternatives or to validate an unproven premise. The paper is self-contained in the sense that its measured quantities are independent of the conclusions drawn from them, so no circular step is present.

Assumptions & free parameters 0 free parameters · 3 assumptions · 0 invented entities

No free parameters or invented entities are introduced. The only fits in the paper are the standard charge-spectrum parameters used to extract gain, which are measurement tools rather than adjustable inputs to a derivation. The listed axioms are the domain-level assumptions on which the radioactivity and surface activity claims rest.

assumptions (3)
  • domain assumption The HPGe detection efficiency computed with BambooMC (Geant4) is correct for the complex PMT geometry.
    Section 2.1 uses BambooMC to convert measured gamma peak counts into activities; if the simulated geometry or material composition is wrong, the quoted mBq/PMT values would be biased.
  • domain assumption The radon emanation measurement via electrostatic collection of 214Po/218Po has a known and calibrated collection efficiency.
    Section 2.2 relies on the PandaX-4T radon emanation systems (Ref. [34]) to place the <3.2 µBq/PMT limit; the efficiency of collection is not re-derived here.
  • domain assumption The surface alpha activity of the assembled PMT is represented by the measured quartz sample after the same cleaning procedure.
    Section 2.3 measures 210Po on quartz samples (Table 7), not on the actual PMT; the abstract quotes the sample upper limit as the PMT surface activity.

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Cite this review

Pith. "Pith review of A Novel Low-Background Photomultiplier Tube Developed for Xenon Based Detectors." pith.science (2026). https://pith.science/paper/E2NDJBJE

@misc{pith2026241210830,
  author       = {Pith},
  title        = {Pith review of: A Novel Low-Background Photomultiplier Tube Developed for Xenon Based Detectors},
  year         = {2026},
  howpublished = {\url{https://pith.science/paper/E2NDJBJE}},
  note         = {Machine review of arXiv:2412.10830}
}
abstract

Photomultiplier tubes (PMTs) are essential in xenon detectors like PandaX, LZ, and XENON experiments for dark matter searches and neutrino properties measurement. To minimize PMT-induced backgrounds, stringent requirements on PMT radioactivity are crucial. A novel 2-inch low-background R12699 PMT has been developed through a collaboration between the PandaX team and Hamamatsu Photonics K.K. corporation. Radioactivity measurements conducted with a high-purity germanium detector show levels of approximately 0.08 mBq/PMT for $\rm^{60}Co$ and 0.06~mBq/PMT for the $\rm^{238}U$ late chain, achieving a 15-fold reduction compared to R11410 PMT used in PandaX-4T. The radon emanation rate is below 3.2 $\rm \mu$Bq/PMT (@90\% confidence level), while the surface $\rm^{210}Po$ activity is less than 18.4 $\mu$Bq/cm$^2$. The electrical performance of these PMTs at cryogenic temperature was evaluated. With an optimized readout base, the gain was enhanced by 30\%, achieving an average gain of $4.23 \times 10^6$ at -1000~V and -100~$^{\circ}$C. The dark count rate averaged 2.5~Hz per channel. Compactness, low radioactivity, and robust electrical performance in the cryogenic temperature make the R12699 PMT ideal for next-generation liquid xenon detectors and other rare event searches.

Figures

Figures reproduced from arXiv: 2412.10830 by the authors.

Figure 1
Figure 1. The three types of PMTs shown here are applied for the three generations of liquid [PITH_FULL_IMAGE:figures/full_fig_p003_1.png] view at source ↗
Figure 2
Figure 2. , the structure of the R12699 PMT comprises a quartz faceplate window that facilitates the penetration of VUV light, electrodes, ceramic insulators, and stainless steel (SS) anodes within a metal body. The different parts are numbered for clarity in the subsequent discussion [PITH_FULL_IMAGE:figures/full_fig_p004_2.png] view at source ↗
Figure 3
Figure 3. (Left) The measurement arrangement and simulated configuration in Geant4 of [PITH_FULL_IMAGE:figures/full_fig_p006_3.png] view at source ↗
Figures from the paper (9 more)
Figure 4
Figure 4. Figure 4: The material radioactivity budget of R12699 PMT. [PITH_FULL_IMAGE:figures/full_fig_p008_4.png]
Figure 5
Figure 5. Figure 5: The radioactivity comparison of PMTs (Unit: mBq/cm [PITH_FULL_IMAGE:figures/full_fig_p010_5.png]
Figure 6
Figure 6. Figure 6: The schematic diagram of the -1000 V biased PMT readout base with the producer [PITH_FULL_IMAGE:figures/full_fig_p012_6.png]
Figure 7
Figure 7. Figure 7: The curve of incident PE number per unit area and the PMT measured PE number [PITH_FULL_IMAGE:figures/full_fig_p014_7.png]
Figure 8
Figure 8. Figure 8: The block diagram illustrating the instruments involved in the PMT-batch qualifi [PITH_FULL_IMAGE:figures/full_fig_p015_8.png]
Figure 9
Figure 9. Figure 9: A view of the inner volume of the Dewar vessel, the PMT bases are in the middle [PITH_FULL_IMAGE:figures/full_fig_p015_9.png]
Figure 10
Figure 10. Figure 10: (Left) The charge spectrum of a single PMT channel. The data is shown in blue [PITH_FULL_IMAGE:figures/full_fig_p017_10.png]
Figure 11
Figure 11. Figure 11: (Left) Distribution of the DCRs of 216 channels of the 54 tested R12699 PMTs at [PITH_FULL_IMAGE:figures/full_fig_p019_11.png]
Figure 12
Figure 12. Figure 12: A typical AP signal waveform. The main signal at 0.34 [PITH_FULL_IMAGE:figures/full_fig_p019_12.png]

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Reference graph

Works this paper leans on

42 extracted references · 38 canonical work pages

  1. [34]

    Qian, et al., Low radioactive material screening and background control for the PandaX-4T experiment, JHEP 06 (2022) 147

    Z. Qian, et al., Low radioactive material screening and background control for the PandaX-4T experiment, JHEP 06 (2022) 147

    work page 2022

  2. [1]

    Craig, A

    N. Craig, A. Katz, The Fraternal WIMP Miracle, JCAP 10 (2015) 054

    work page 2015

  3. [2]

    Bo, et al., Dark Matter Search Results from 1.54 Tonne ·Year Exposure of PandaX-4T (Aug 2024)

    Z. Bo, et al., Dark Matter Search Results from 1.54 Tonne ·Year Exposure of PandaX-4T (Aug 2024). arXiv:2408.00664

    arXiv 2024

  4. [3]

    W. H. Furry, On transition probabilities in double beta-disintegration, Phys. Rev. 56 (1939) 1184–1193. 21

    work page 1939

  5. [4]

    E. Aprile, et al., Detection of liquid xenon scintillation light with a silicon photomultiplier, Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equip- ment 556 (1) (2006) 215–218

    work page 2006

  6. [5]

    Cheshnovsky, B

    O. Cheshnovsky, B. Raz, J. Jortner, Temperature dependence of rare gas molecular emission in the vacuum ultraviolet, Chemical Physics Letters 15 (4) (1972) 475–479

    work page 1972

  7. [6]

    Chepel, H

    V. Chepel, H. Ara´ ujo, Liquid noble gas detectors for low energy particle physics, JINST 8 (04) (2013) R04001

    work page 2013

  8. [7]

    Hamamatsu Photonics K.K, Photomultiplier tube R8520-406, https:// hep.hamamatsu.com/eu/en/products/R8520-406.html, Accessed July 5 (2024)

    work page 2024

Show all 42 references
  1. [8]

    Xiao, et al., First dark matter search results from the PandaX-I exper- iment, Sci

    M. Xiao, et al., First dark matter search results from the PandaX-I exper- iment, Sci. China Phys. Mech. Astron. 57 (2014) 2024–2030

    2014

  2. [9]

    Angle, et al., First Results from the XENON10 Dark Matter Experiment at the Gran Sasso National Laboratory, Phys

    J. Angle, et al., First Results from the XENON10 Dark Matter Experiment at the Gran Sasso National Laboratory, Phys. Rev. Lett. 100 (2008) 021303

    2008

  3. [10]

    Hamamatsu Photonics K.K, Photomultiplier tube R11410-20A, https://www.hamamatsu.com/us/en/product/optical-sensors/pmt/ pmt_tube-alone/head-on-type/R11410-20A.html , Accessed July 5 (2024)

    2024

  4. [11]

    Aprile, et al., First Dark Matter Search with Nuclear Recoils from the XENONnT Experiment, Phys

    E. Aprile, et al., First Dark Matter Search with Nuclear Recoils from the XENONnT Experiment, Phys. Rev. Lett. 131 (4) (2023) 041003

    2023

  5. [12]

    Aprile, et al., The XENONnT Dark Matter Experiment (Feb 2024)

    E. Aprile, et al., The XENONnT Dark Matter Experiment (Feb 2024). arXiv:2402.10446

    2024 arXiv

  6. [13]

    B. L. Paredes, et al., Response of photomultiplier tubes to xenon scintilla- tion light, Astroparticle Physics 102 (2018) 56–66. 22

    2018

  7. [14]

    Mount, LUX-ZEPLIN (LZ) technical design report, Tech

    B. Mount, LUX-ZEPLIN (LZ) technical design report, Tech. rep., Argonne National Lab.(ANL), Argonne, IL (United States) (2017)

    2017

  8. [15]

    Meng, et al., Dark Matter Search Results from the PandaX-4T Com- missioning Run, Phys

    Y. Meng, et al., Dark Matter Search Results from the PandaX-4T Com- missioning Run, Phys. Rev. Lett. 127 (26) (2021) 261802

    2021

  9. [16]

    Aalbers, et al., The XLZD Design Book: Towards the Next-Generation Liquid Xenon Observatory for Dark Matter and Neutrino Physics (Oct 2024)

    J. Aalbers, et al., The XLZD Design Book: Towards the Next-Generation Liquid Xenon Observatory for Dark Matter and Neutrino Physics (Oct 2024). arXiv:2410.17137

    2024

  10. [17]

    Macolino, Dark matter search to the limits: the DAR WIN experiment, PoS ICHEP2022 (2022) 279

    C. Macolino, Dark matter search to the limits: the DAR WIN experiment, PoS ICHEP2022 (2022) 279

    2022

  11. [18]

    Nakamura, et al., Research and development toward KamLAND2-Zen, J

    R. Nakamura, et al., Research and development toward KamLAND2-Zen, J. Phys. Conf. Ser. 1468 (1) (2020) 012256

    2020

  12. [19]

    Abdukerim, et al., PandaX-xT: a Multi-ten-tonne Liquid Xenon Obser- vatory at the China Jinping Underground Laboratory (Feb 2024)

    A. Abdukerim, et al., PandaX-xT: a Multi-ten-tonne Liquid Xenon Obser- vatory at the China Jinping Underground Laboratory (Feb 2024). arXiv: 2402.03596

    2024 arXiv

  13. [20]

    C. A. O’Hare, New definition of the neutrino floor for direct dark matter searches, Phys. Rev. Lett. 127 (25) (2021) 251802

    2021

  14. [21]

    Aalbers, et al., A next-generation liquid xenon observatory for dark matter and neutrino physics, Journal of Physics G: Nuclear and Particle Physics 50 (1) (2022) 013001

    J. Aalbers, et al., A next-generation liquid xenon observatory for dark matter and neutrino physics, Journal of Physics G: Nuclear and Particle Physics 50 (1) (2022) 013001

    2022

  15. [22]

    html, Accessed July 5 (2024)

    Hamamatsu Photonics K.K, Multianode photomultiplier tube R12699-406- M4, https://hep.hamamatsu.com/eu/en/products/R12699-406-M4. html, Accessed July 5 (2024)

    2024

  16. [23]

    Li, et al., The second-phase development of the China JinPing under- ground Laboratory, Phys

    J. Li, et al., The second-phase development of the China JinPing under- ground Laboratory, Phys. Procedia 61 (2015) 576–585

    2015

  17. [24]

    Guo, et al., Muon flux measurement at China Jinping Underground Laboratory, Chin

    Z. Guo, et al., Muon flux measurement at China Jinping Underground Laboratory, Chin. Phys. C 45 (2) (2021) 025001. 23

    2021

  18. [25]

    L. A. Currie, Limits for qualitative detection and quantitative determi- nation. Application to radiochemistry, Analytical chemistry 40 (3) (1968) 586–593

    1968

  19. [26]

    Wang, et al., Material Screening with HPGe Counting Station for Pan- daX Experiment, JINST 11 (12) (2016) T12002

    X. Wang, et al., Material Screening with HPGe Counting Station for Pan- daX Experiment, JINST 11 (12) (2016) T12002

    2016

  20. [27]

    Yao, High-purity Germanium Gamma Spectrometry and Radioactive Measurement, Master’s thesis, Shanghai Jiao Tong University (2022)

    Y. Yao, High-purity Germanium Gamma Spectrometry and Radioactive Measurement, Master’s thesis, Shanghai Jiao Tong University (2022)

    2022

  21. [28]

    Chen, et al., BambooMC — A Geant4-based simulation program for the PandaX experiments, JINST 16 (09) (2021) T09004

    X. Chen, et al., BambooMC — A Geant4-based simulation program for the PandaX experiments, JINST 16 (09) (2021) T09004

    2021

  22. [29]

    Baudis, et al., Characterisation of Silicon Photomultipliers for Liquid Xenon Detectors, JINST 13 (10) (2018) P10022

    L. Baudis, et al., Characterisation of Silicon Photomultipliers for Liquid Xenon Detectors, JINST 13 (10) (2018) P10022

    2018

  23. [30]

    SiPM R&D for nEXO, https://agenda.infn.it/event/ 17801/contributions/99225/attachments/67201/82502/ EXOBariSiPMWksp2019.pdf (2019)

    2019

  24. [31]

    Cebri´ an, et al., Radiopurity assessment of the energy readout for the NEXT double beta decay experiment, JINST 12 (08) (2017) T08003

    S. Cebri´ an, et al., Radiopurity assessment of the energy readout for the NEXT double beta decay experiment, JINST 12 (08) (2017) T08003

    2017

  25. [32]

    D. S. Akerib, et al., The LUX-ZEPLIN (LZ) radioactivity and cleanliness control programs, Eur. Phys. J. C 80 (11) (2020) 1044

    2020

  26. [33]

    Aprile, et al., Material radiopurity control in the XENONnT experiment, Eur

    E. Aprile, et al., Material radiopurity control in the XENONnT experiment, Eur. Phys. J. C 82 (7) (2022) 599

    2022

  27. [35]

    Abe, Development of low background PMT R13111, J

    K. Abe, Development of low background PMT R13111, J. Phys. Conf. Ser. 1468 (1) (2020) 012231

    2020

  28. [36]

    Hamamatsu Photonics K.K editorial committee, Photomultiplier Tubes - Basics and Applications, 3rd edition, Hamamatsu Photonics K.K, 2006. 24

    2006

  29. [37]

    Luo, et al., Improvement on the linearity response of PandaX-4T with new photomultiplier tube bases, JINST 19 (05) (2024) P05021

    L. Luo, et al., Improvement on the linearity response of PandaX-4T with new photomultiplier tube bases, JINST 19 (05) (2024) P05021

    2024

  30. [38]

    He, et al., A 500 MS/s waveform digitizer for PandaX dark matter experiments, JINST 16 (12) (2021) T12015

    C. He, et al., A 500 MS/s waveform digitizer for PandaX dark matter experiments, JINST 16 (12) (2021) T12015

    2021

  31. [39]

    E. Bellamy, et al., Absolute calibration and monitoring of a spectromet- ric channel using a photomultiplier, Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 339 (3) (1994) 468–476

    1994

  32. [40]

    Bauer, et al., Qualification tests of 474 photomultiplier tubes for the in- ner detector of the Double Chooz experiment, JINST 6 (06) (2011) P06008

    C. Bauer, et al., Qualification tests of 474 photomultiplier tubes for the in- ner detector of the Double Chooz experiment, JINST 6 (06) (2011) P06008

    2011

  33. [41]

    Huang, Development of the photosensor system for PandaX-4T and the search for light-mediator-dark-matter, Ph.D

    D. Huang, Development of the photosensor system for PandaX-4T and the search for light-mediator-dark-matter, Ph.D. thesis, School of physics and astronomy, Shanghai Jiao Tong University (2023)

    2023

  34. [42]

    Barrow, et al., Qualification tests of the R11410-21 photomultiplier tubes for the XENON1T detector, JINST 12 (01) (2017) P01024

    P. Barrow, et al., Qualification tests of the R11410-21 photomultiplier tubes for the XENON1T detector, JINST 12 (01) (2017) P01024. 25

    2017

Pith tools

Reviewed August 11, 2026 · model on record in the stance chip above.