pith. machine review for the scientific record. sign in

arxiv: 2604.07381 · v1 · submitted 2026-04-08 · ⚛️ physics.ins-det · hep-ex

Recognition: 2 theorem links

· Lean Theorem

Long-term stability study of single-mask triple GEM detector: impact of continuous irradiation

S. Mandal , S. Gope , S. Das , S. Biswas
Authors on Pith no claims yet

Pith reviewed 2026-05-10 18:31 UTC · model grok-4.3

classification ⚛️ physics.ins-det hep-ex
keywords GEM detectorlong-term stabilitycontinuous irradiationenergy resolutiongain stability55Fe sourceMPGD
0
0 comments X

The pith

A single-mask triple GEM detector maintained stable gain and energy resolution through 98 days of uninterrupted irradiation.

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

The paper tests whether a triple GEM detector can keep its core performance metrics steady when one section receives continuous radiation exposure for nearly 100 days. Researchers used a 55Fe source in an argon-CO2 mixture, recorded gain, energy resolution, and count rate at regular intervals, and corrected the data for measured changes in temperature, pressure, and humidity. If the detector shows no degradation beyond ambient effects, the result supports placing similar detectors into high-radiation environments without expecting rapid aging. The work also tracks long-term count-rate behavior under a strong source to check for any gradual shifts in efficiency.

Core claim

The gain and energy resolution of the single-mask triple GEM detector remained stable during 98 days of continuous, uninterrupted irradiation from a 55Fe source. Variations observed in the data were accounted for by simultaneous recordings of ambient temperature, pressure, and relative humidity, leaving no evidence of radiation-induced degradation in the tested patch.

What carries the argument

Continuous irradiation of a single patch on the detector while periodically measuring gain and energy resolution, with corrections applied for recorded ambient parameters.

If this is right

  • The detector can sustain prolonged exposure without measurable performance loss in the tested conditions.
  • Efficiency and count rate with a strong source also show no significant long-term decline.
  • Ambient-parameter corrections are sufficient to interpret stability data over multi-month periods.
  • Single-mask triple GEM chambers are viable candidates for installation in experiments requiring continuous operation.

Where Pith is reading between the lines

These are editorial extensions of the paper, not claims the author makes directly.

  • Similar tests with different gas mixtures or higher particle fluxes would clarify the range of conditions under which stability holds.
  • Comparison with actual beam-induced backgrounds in an accelerator hall would test whether the lab result generalizes.
  • If stability persists, detector replacement intervals in large experiments could be extended beyond current assumptions.

Load-bearing premise

The laboratory 55Fe source and controlled conditions produce radiation flux, particle types, and duty cycle that match those expected in a real high-energy physics experiment.

What would settle it

A clear drop in gain or broadening of the energy resolution peak after 98 days that persists after correcting for all measured changes in temperature, pressure, and humidity.

Figures

Figures reproduced from arXiv: 2604.07381 by S. Biswas, S. Das, S. Gope, S. Mandal.

Figure 1
Figure 1. Figure 1: Schematic of the high voltage (HV) distribution resistive chain [PITH_FULL_IMAGE:figures/full_fig_p003_1.png] view at source ↗
Figure 2
Figure 2. Figure 2: Schematic representation of the electronic circuit [17]. [PITH_FULL_IMAGE:figures/full_fig_p003_2.png] view at source ↗
Figure 3
Figure 3. Figure 3: Schematic of the position of the radioactive source on the chamber. [PITH_FULL_IMAGE:figures/full_fig_p004_3.png] view at source ↗
Figure 4
Figure 4. Figure 4: (Colour online) Typical 55Fe spectrum in Ar/CO2 (70/30 volume ratio) gas mixture at - 4700 V. The ∆V across each of the GEM foils is ∼ 403.2 V. P ulse height (V ) = MCA Channel no. × 0.0014 + 0.1428 (2) Further details of the MCA calibration procedure can be found in Ref. [20]. The energy resolution of the detector is determined from the full width at half maximum (FWHM) of the Gaussian-fitted energy spect… view at source ↗
Figure 5
Figure 5. Figure 5: (Colour online) Applied voltage and divider current as a function [PITH_FULL_IMAGE:figures/full_fig_p008_5.png] view at source ↗
Figure 6
Figure 6. Figure 6: (Colour online) The applied voltage, measured divider current, [PITH_FULL_IMAGE:figures/full_fig_p009_6.png] view at source ↗
Figure 7
Figure 7. Figure 7: (Colour online) 55Fe spectra in different selected time. decreases, and the same trend is observed in the [PITH_FULL_IMAGE:figures/full_fig_p009_7.png] view at source ↗
Figure 8
Figure 8. Figure 8: (Colour online) Gain and T/p correlation plot for different time [PITH_FULL_IMAGE:figures/full_fig_p010_8.png] view at source ↗
Figure 9
Figure 9. Figure 9: (Colour online) Energy resolution and T/p correlation plot for [PITH_FULL_IMAGE:figures/full_fig_p011_9.png] view at source ↗
Figure 10
Figure 10. Figure 10: (Colour online) Normalised gain, normalised energy resolution [PITH_FULL_IMAGE:figures/full_fig_p012_10.png] view at source ↗
Figure 11
Figure 11. Figure 11: (Colour online) Normalised gain and normalised energy resolution [PITH_FULL_IMAGE:figures/full_fig_p013_11.png] view at source ↗
Figure 12
Figure 12. Figure 12: (Colour online) Distribution of normalised gain and normalised [PITH_FULL_IMAGE:figures/full_fig_p013_12.png] view at source ↗
Figure 13
Figure 13. Figure 13: (Colour online) Normalised gain (Left) and normalised energy [PITH_FULL_IMAGE:figures/full_fig_p014_13.png] view at source ↗
Figure 14
Figure 14. Figure 14: (Colour online) Bias current corrected normalised gain and nor [PITH_FULL_IMAGE:figures/full_fig_p015_14.png] view at source ↗
Figure 15
Figure 15. Figure 15: (Colour online) Count rate as a function of time. [PITH_FULL_IMAGE:figures/full_fig_p016_15.png] view at source ↗
Figure 16
Figure 16. Figure 16: (Colour online) Count rate as a function of bias current. [PITH_FULL_IMAGE:figures/full_fig_p016_16.png] view at source ↗
Figure 17
Figure 17. Figure 17: (Colour online) Distribution of the count rate. [PITH_FULL_IMAGE:figures/full_fig_p017_17.png] view at source ↗
Figure 18
Figure 18. Figure 18: Fig.18. No significant correlation between count rate and gain is observed [PITH_FULL_IMAGE:figures/full_fig_p017_18.png] view at source ↗
Figure 18
Figure 18. Figure 18: (Colour online) Count rate as a function of gain. [PITH_FULL_IMAGE:figures/full_fig_p018_18.png] view at source ↗
read the original abstract

A study has been carried out to evaluate the performance stability of Gas Electron Multiplier (GEM) chamber prototypes in the laboratory using $^{55}$Fe radiation source with Argon and CO$_2$ gas mixture. This research focuses on the characterisation of the GEM detector's gain, efficiency (count rate with radioactive source), and energy resolution under varying operational conditions. A patch on the detector has been subjected to continuous and absolutely uninterrupted radiation for about 98 days. The gain and energy resolution of the detector are measured along with the ambient parameters temperature (t), pressure (p) and relative humidity (RH). In addition to that, the long-term behaviour of the count rate with a strong radioactive source are also studied. This work is very relevant for Micro Pattern Gaseous Detectors (MPGD) such as GEM before installing on large experiment. The experimental setup, methodology, and results are presented in this article.

Editorial analysis

A structured set of objections, weighed in public.

Desk editor's note, referee report, simulated authors' rebuttal, and a circularity audit. Tearing a paper down is the easy half of reading it; the pith above is the substance, this is the friction.

Referee Report

0 major / 4 minor

Summary. The manuscript reports a laboratory study of the long-term stability of a single-mask triple GEM detector under continuous, uninterrupted 55Fe irradiation for approximately 98 days in an Ar-CO2 gas mixture. The authors present time-series measurements of gain, energy resolution, and count rate, with explicit corrections applied for measured ambient temperature, pressure, and relative humidity. The central claim is that detector performance remains stable under these conditions after accounting for environmental variations.

Significance. If the results hold, the work supplies useful empirical data on GEM aging under prolonged irradiation, directly relevant to MPGD deployment in high-energy physics. Strengths include the provision of time-series data, count-rate monitoring with a strong source, and documented correction procedures for ambient parameters, which support reproducibility of the stability assessment within the controlled lab setting.

minor comments (4)
  1. Abstract: the phrase 'absolutely uninterrupted' is redundant; 'uninterrupted' suffices.
  2. Results section: time-series plots of gain and energy resolution should explicitly state the normalization procedure (e.g., the functional form used for T/P/RH corrections) and include quantitative measures of stability such as RMS variation or fitted slopes with uncertainties.
  3. Figure captions: include the exact gas mixture ratio (e.g., Ar:CO2 70:30), source activity, and irradiation duration for each panel to improve standalone readability.
  4. Discussion: the irradiation rate achieved with the 55Fe source should be compared numerically to expected rates in target experiments to clarify the scope of applicability, even if the primary claim is limited to the lab conditions.

Simulated Author's Rebuttal

0 responses · 0 unresolved

We thank the referee for the careful review and positive assessment of our manuscript on the long-term stability of a single-mask triple GEM detector. The referee's summary correctly identifies the key elements of the study, including the 98-day uninterrupted irradiation, environmental corrections, and relevance to MPGD applications. We appreciate the recognition of the time-series data, count-rate monitoring, and reproducibility aspects. We will prepare a revised version addressing minor points as recommended.

Circularity Check

0 steps flagged

No circularity: purely experimental stability measurements with no derivations or self-referential predictions

full rationale

The paper reports laboratory measurements of gain, energy resolution, count rate, and ambient corrections (T, P, RH) for a triple GEM detector under continuous 55Fe irradiation over 98 days. No equations, fitted models, or predictions are claimed; results are direct time-series data with standard normalization for environmental factors. No self-citations are used to justify any derivation, and the central claim rests on independent experimental observations rather than any reduction to inputs by construction. This matches the default non-circular case for empirical reports.

Axiom & Free-Parameter Ledger

0 free parameters · 0 axioms · 0 invented entities

Experimental study; no free parameters, mathematical axioms, or invented entities are introduced.

pith-pipeline@v0.9.0 · 5462 in / 940 out tokens · 26039 ms · 2026-05-10T18:31:15.048605+00:00 · methodology

discussion (0)

Sign in with ORCID, Apple, or X to comment. Anyone can read and Pith papers without signing in.

Lean theorems connected to this paper

Citations machine-checked in the Pith Canon. Every link opens the source theorem in the public Lean library.

What do these tags mean?
matches
The paper's claim is directly supported by a theorem in the formal canon.
supports
The theorem supports part of the paper's argument, but the paper may add assumptions or extra steps.
extends
The paper goes beyond the formal theorem; the theorem is a base layer rather than the whole result.
uses
The paper appears to rely on the theorem as machinery.
contradicts
The paper's claim conflicts with a theorem or certificate in the canon.
unclear
Pith found a possible connection, but the passage is too broad, indirect, or ambiguous to say the theorem truly supports the claim.

Forward citations

Cited by 1 Pith paper

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. Charging-up and reverse charging-up phenomena in a double-mask triple GEM detector

    physics.ins-det 2026-04 unverdicted novelty 6.0

    A double-mask triple GEM detector exhibits charging-up under high irradiation and reverse charging-up when irradiation decreases, causing gain to vary and stabilize in Ar/CO2 gas.

Reference graph

Works this paper leans on

31 extracted references · 1 canonical work pages · cited by 1 Pith paper

  1. [1]

    Sauli, Nucl

    F. Sauli, Nucl. Instrum. Methods Phys. Res. A 386 (1997) 531

    1997

  2. [2]

    Buzulutskov, Instrum Exp Tech 50, (2007) 287

    A.F. Buzulutskov, Instrum Exp Tech 50, (2007) 287

    2007

  3. [3]

    Ketzeret al.,, Nucl

    B. Ketzeret al.,, Nucl. Instrum. Methods Phys. Res. A 535 (2004) 314

    2004

  4. [4]

    Galatyuk, Nucl

    T. Galatyuk, Nucl. Phys. A 982 (2019) 163

    2019

  5. [5]

    https://www.cbm.gsi.de/

  6. [6]

    http://www.fair-center.eu/

  7. [7]

    Rama Prasad Adaket al.,Nucl. Instrum. Methods Phys. Res. A 846 (2017) 29

    2017

  8. [8]

    A. K. Sharmaet al.,Proc. DAE Symp. Nucl. Phys. 67 (2023) 1011

    2023

  9. [9]

    Biswaset al.,Nucl

    S. Biswaset al.,Nucl. Instrum. Methods Phys. Res. A 800 (2015) 93

    2015

  10. [10]

    Oliveiraet al.,United States Patent, US 8,597,490 B2 (2013)

    2013

  11. [11]

    Duarte Pintoet al.,JINST 4 (2009) P12009

    S. Duarte Pintoet al.,JINST 4 (2009) P12009

    2009

  12. [12]

    Karadzhinovaet al.,JINST 10 (2015) P12014

    A. Karadzhinovaet al.,JINST 10 (2015) P12014

    2015

  13. [13]

    Das, Nucl

    S. Das, Nucl. Instrum. Methods Phys. Res. A 824 (2016) 518

    2016

  14. [14]

    Shahet al.,Nucl

    A. Shahet al.,Nucl. Instrum. Methods Phys. Res. A 936 (2019) 459

    2019

  15. [15]

    Bachmannet al.,Nucl

    S. Bachmannet al.,Nucl. Instrum. Methods Phys. Res. A 438 (1999) 376

    1999

  16. [16]

    Chatterjeeet al.,Nucl

    S. Chatterjeeet al.,Nucl. Instrum. Methods Phys. Res. A 1014 (2021) 165749

    2021

  17. [17]

    Mandalet al.,Pramana - Journal of Physics (In Press), arXiv:2505.03357 (2025)

    S. Mandalet al.,Pramana - Journal of Physics (In Press), arXiv:2505.03357 (2025)

    work page arXiv 2025

  18. [18]

    CDT CASCADE Detector Technologies GmbH, Germany, www.n- cdt.com

  19. [19]

    Mandalet al.,Nucl

    S. Mandalet al.,Nucl. Instrum. Methods Phys. Res. A 1064 (2024) 169389

    2024

  20. [20]

    Thesis, University of Calcutta, 2023

    Shreya Roy, Characterization Of Gaseous And Scintillator Detectors For High Energy Physics And Cosmic Ray Experiments, Ph.D. Thesis, University of Calcutta, 2023. 20

    2023

  21. [21]

    Thesis, University of Calcutta, 2023

    Arindam Sen, Development Of Resistive Plate Chamber For The CBM Experiment At FAIR And Other Application Of Radiation Detector, Ph.D. Thesis, University of Calcutta, 2023

    2023

  22. [22]

    Thesis, University of Calcutta, 2023

    Sayak Chatterjee, Performance Studies of Gas Electron Multiplier De- tector for the Muon Chamber of High Rate CBM Experiment at FAIR, Ph.D. Thesis, University of Calcutta, 2023

    2023

  23. [23]

    Adaket al.,2016 JINST 11 T10001

    R.P. Adaket al.,2016 JINST 11 T10001

    2016

  24. [24]

    Royet al.,Nucl

    S. Royet al.,Nucl. Instrum. Methods Phys. Res. A 936 (2019) 485

    2019

  25. [25]

    Chatterjeeet al.,Nucl

    S. Chatterjeeet al.,Nucl. Instrum. Methods Phys. Res. A 936 (2019) 491

    2019

  26. [26]

    Chatterjeeet al.,Journal of Physics: Conference Series 1498 (2020) 012037

    S. Chatterjeeet al.,Journal of Physics: Conference Series 1498 (2020) 012037

    2020

  27. [27]

    Chatterjeeet al.,2020 JINST 15 T09011

    S. Chatterjeeet al.,2020 JINST 15 T09011

    2020

  28. [28]

    Chatterjeeet al.,Nucl

    S. Chatterjeeet al.,Nucl. Instrum. Methods Phys. Res. A 1046 (2023) 167747

    2023

  29. [29]

    Chatterjeeet al.,Nucl

    S. Chatterjeeet al.,Nucl. Instrum. Methods Phys. Res. A 1049 (2023) 168110

    2023

  30. [30]

    S Sahuet al.,JINST 12, C05006 (2017)

    2017

  31. [31]

    Mandalet al.,Proc

    S. Mandalet al.,Proc. DAE Symp. Nucl. Phys. 69 (2025) 1299-1300. 21

    2025