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REVIEW 3 major objections 4 minor 49 references

Edge Radial Electric Field in Positive and Negative Triangularity Plasmas in the TCV Tokamak

T0 review · 3 major / 4 minor · reviewed 2026-08-06 · deepseek-v4-flash

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Pith's one-line read Negative triangularity plasma shapes produce a deeper edge radial electric field well and stronger flow shear than positive triangularity in matched TCV discharges.

desk verdict Useful new matched NT/PT edge Er data with an honest but unresolved q95 confound; worth refereeing, with requests for error bars and a q95 control. read the letter →

arxiv 2507.08682 v1 pith:4YFJG5KO submitted 2025-07-11 physics.plasm-ph

S. Rienäcker , P. Hennequin , L. Vermare , C. Honoré , R. Bouffet-Klein , S. Coda , B. Labit , B. Vincent
show 5 more authors
K.E. Thome O. Krutkin A. Balestri Y. Nakeva the TCV team
This is my paper · ORCID
classification physics.plasm-ph
keywords negativetriangularityradialelectricfieldDopplerbackscatteringExBsheartokamakedgeTCVL-modeconfinementturbulence
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

The paper reports the first systematic edge radial electric field comparison between negative triangularity (NT) and positive triangularity (PT) plasmas in the TCV tokamak. Using Doppler backscattering to measure the perpendicular velocity $v_\perp \approx E_r/B$, it finds that NT discharges have a deeper $E_r$ well and stronger $E_r \times B$ shear than matched PT discharges in Ohmic, NBI, and ECRH heated L-modes. In a higher-performance NBI scenario, the NT well depth sits between PT L-mode and PT H-mode. The authors argue this shear difference offers a candidate mechanism for the known NT confinement gain, consistent with lower ion-scale turbulence measured by the same diagnostic.

What carries the argument

The measurement chain is Doppler backscattering (DBS): a microwave beam scatters off density fluctuations near its turning point, and the Doppler shift of the returned signal gives the lab-frame perpendicular velocity $v_\perp \approx E_r/B$, assuming the turbulence intrinsic velocity is negligible. Stepping the probing frequency maps $v_\perp$ radially, and matching the upper half of the shapes keeps the probing geometry and selected perpendicular wavenumber nearly identical between NT and PT, so the comparison isolates shaping. The $E_r \times B$ shear is then the radial gradient of this velocity. A complementary outer-core $E_r$ estimate from the carbon impurity force balance checks the DBS result in the L-mode cases.

What would settle it

Run an NT/PT pair in TCV with q95 equalized by adjusting plasma current or toroidal field at fixed shape, and compare the E_r well depth; if the well-depth ordering disappears or tracks q95 rather than triangularity, the central claim would not follow.

Watch

Extended reading notes

Core claim

The central claim is that plasma triangularity controls the edge electric field: in matched NT/PT discharges in TCV, NT produces a sharper $E_r$ well ($v_\perp$ minimum about $-4$ km/s versus $-2$ km/s in the Ohmic pair) and a visibly stronger $E_r \times B$ shear just inside the separatrix. The same ordering appears when the two shapes are heated by NBI or ECRH, and even when PT receives more power so the kinetic profiles match; it also persists in a fully NT shape with unfavorable $B \times \nabla B$ drift, where the well stays deeper than a PT L-mode and shallower than a PT H-mode. The paper connects this to the edge confinement gain: NT shows a higher density pedestal at the well location, roughly 30% higher $\tau_E$ in the Ohmic pair, and lower DBS turbulence power by factors of about 1 to 1.8 in matched-profile pairs.

Load-bearing premise

The matched NT/PT discharges are assumed to isolate triangularity, but at fixed current and field the NT shapes have lower edge safety factor q95 than PT (4.2 vs 3.9 in the Ohmic pair; 4.0 vs 5.7 in the higher-performance pair), and the paper explicitly sets aside whether q95 differences affect E_r.

Editorial extensions

If this is right

  • NT edges in TCV have a deeper $E_r$ well and stronger $E_r \times B$ shear than PT edges across Ohmic, NBI, and ECRH heating.
  • The shear difference coincides with higher edge density, higher $\tau_E$, and lower DBS turbulence power in NT, supporting shear-regulated transport as part of the NT confinement mechanism.
  • In the higher-performance NBI case, the NT L-mode $E_r$ well is intermediate between PT L-mode and PT H-mode, implying NT can approach H-mode-like edge flow shear without the H-mode pedestal.
  • Under favorable $B \times \nabla B$ drift, the L-mode well is expected to deepen further, so the NT well may come closer to PT H-mode values in standard configurations.

Reading between the lines

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

  • If a later q95-matched scan reproduces the well-depth ordering, the result would make edge flow shear a quantitative design driver: NT shapes could be chosen partly to engineer $E_r \times B$ shear in L-mode.
  • The reported DBS power reduction (roughly a factor of 1 to 1.8) leaves open how much of the turbulence decrease comes from shear versus from shaping-induced changes in instability drive; a gyrokinetic simulation with and without the measured $E_r$ profile would separate the two.
  • A testable extension is to map the threshold: scanning triangularity from PT through near-zero to strong NT while holding q95 fixed would show whether well depth responds linearly to $\delta$ or saturates.
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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 / 4 minor

Summary. This paper reports Doppler backscattering (DBS) measurements of the edge perpendicular velocity v_perp ≈ E_r/B in TCV, comparing negative triangularity (NT) and positive triangularity (PT) L-mode plasmas in Ohmic, NBI, and ECRH discharges, plus a higher-performance NBI scenario. The central observation is that the NT cases display a deeper v_perp (E_r) well and stronger inferred E_r × B shear than the PT counterparts, with a force-balance E_r estimate providing a cross-check in the higher-performance section. The authors interpret the deeper well as a candidate mechanism for the improved NT L-mode confinement.

Significance. If the attribution to triangularity holds, this would be the first systematic edge E_r comparison in matched NT/PT discharges and would materially strengthen the empirical basis for the NT edge confinement picture. The paper benefits from a cross-diagnostic check (DBS vs. force balance, Fig. 7b), a consistent trend across three heating scenarios, and an explicit statement of the q95 limitation in Sec. 3. However, the uncontrolled q95 difference between paired discharges and the absence of error bars on the key v_perp profiles mean the evidence presented does not yet isolate triangularity as the causal variable.

major comments (3)
  1. [Sec. 3, Tab. 1 and Tab. 2] The attribution of the deeper E_r well to triangularity is confounded by an unmatched q95. In Tab. 1, q95 = 4.2 (PT) vs. 3.9 (NT); in Tab. 2, q95 = 5.7 (PT L-mode) vs. 4.0 (NT L-mode). The paper states in Sec. 3 that 'The possible effect of q95 on E_r [43, 44] is not discussed here', but Refs. [43, 44] document a q95 dependence of the edge E_r in L-mode. Since q95 is not matched and its effect is not quantified, the observed well-depth difference cannot be unambiguously attributed to triangularity. To support the central claim, the authors should add a q95-matched control (e.g., by varying I_p or B_0) or provide a quantitative estimate or modeling of the expected q95 effect in these discharges.
  2. [Fig. 2(a), Fig. 3(a-b), Fig. 7(a)] The v_perp profiles central to the claim are shown as fit curves without error bars or uncertainty bands. The key NT-PT well-depth difference is about 2 km/s in Fig. 2(a), and the shear estimates in Fig. 7(a) are also presented without quantified uncertainty. Given that each condition corresponds to a single discharge, the word 'unambiguously' in the Summary is not supported. Please provide statistical and systematic uncertainty estimates for v_perp and E_r, and ideally repeat discharges or at least quantify the scatter within the time window used.
  3. [Sec. 4, Tab. 2 and Fig. 5] The higher-performance NT vs. PT comparison is described as 'mirrored', but the shapes are not fully matched: Tab. 2 lists κ = 1.35 (NT) vs. 1.48 (PT L-mode) and δ = −0.49 vs. 0.52, and q95 differs by 4.0 vs. 5.7. This is not an isolated triangularity scan. The text partially acknowledges the limitations, but the conclusion that E_r well depth lies 'in between' PT L- and H-mode should be worded with these differences explicitly stated in the main text, not only in table form.
minor comments (4)
  1. [Sec. 2] The identification v_perp ≈ E_r/B assumes the turbulence intrinsic velocity is negligible; this is a stated physical assumption but should be supported with a reference or a brief estimate of the expected correction in the probed k⊥ range.
  2. [Fig. 4] The PSD integral ratios reflecting turbulence intensity are presented without uncertainty estimates; since this is a secondary result, please add error bars or a sensitivity statement.
  3. [Sec. 3] The phrase 'carefully matched' in the Summary is stronger than what Tab. 1 actually shows: the shapes are matched in κ, δ_top, and δ_bot but not in q95. Please use a more cautious formulation that reflects this uncontrolled parameter.
  4. [Sec. 4] The comparison against a PT H-mode involves different signs of I_p, B_0, and B×∇B drift, and the text acknowledges this; however, the statement that the NT well depth is 'intermediate' should be explicitly labeled as qualitative, given the many uncontrolled differences.

Circularity Check

0 steps flagged · score 0.0 of 10

No circularity: empirical Er comparison with stated v_perp≈Er/B assumption and an independent force-balance cross-check.

full rationale

This paper is an experimental measurement study rather than a derivation chain: the central claim, that the edge Er well and Er×B shear are deeper/stronger in NT than PT, is a direct comparison of Doppler backscattering profiles in matched discharges (Sec. 3, Figs. 2–3; Sec. 4, Fig. 7a). The identification v_perp ≈ Er/B is explicitly presented as a physics assumption in Sec. 2, not as a fitted parameter, and it is independently cross-checked against the C6+ radial force balance in Sec. 4 and Fig. 7b. No predicted quantity is constructed from the data, and no equation reduces to its own input. Self-citations appear only for the DBS diagnostic method ([36], by the first author) and for the acknowledged but undiscussed q95 effect ([43,44]); neither is used to force the triangularity attribution, and the diagnostic method citation supports the measurement rather than the interpretation. The acknowledged q95 mismatch between NT/PT pairs is a genuine confounder and a correctness risk, but it is a threat to causal attribution, not a circularity. Accordingly, no circular step can be quoted and no score above 0 is warranted.

Assumptions & free parameters 0 free parameters · 4 assumptions · 0 invented entities

The paper's central claim rests on a standard DBS proxy (v_perp = Er/B), on the assumption that the matched pairs isolate triangularity despite a systematic q95 difference, and on the standard diagnostic calibrations. No fitted parameters or new entities are introduced; the quantitative significance of the NT/PT difference is limited by the absence of error bars on the key profiles.

assumptions (4)
  • domain assumption DBS v_perp equals Er/B, i.e., the turbulence intrinsic phase velocity is negligible in the measured frame.
    Invoked throughout (abstract, Sec. 2, Sec. 4) to convert the Doppler shift into a radial electric field. The paper states this holds 'if the turbulence intrinsic velocity is negligible' (Sec. 2).
  • domain assumption Matched NT/PT discharges isolate the effect of triangularity on Er.
    The matched-pair design in Secs. 3-4 assumes that residual differences (q95, small k_perp and geometry mismatches) do not dominate the Er difference. The paper notes q95 differs (4.2 vs 3.9; 4.0 vs 5.7) and does not discuss its effect (Sec. 3).
  • domain assumption DBS scattering is localized near the beam turning point, and probed k_perp is matched between NT and PT within about 10%.
    Sec. 2: k_perp in [5,6] rad/cm, with NT/PT differences <10%, which the authors argue minimizes biases from flux expansion and probed wavenumbers.
  • domain assumption The neoclassical force balance calculation with NEO and CXRS inputs gives a valid outer-core Er estimate.
    Used in Sec. 4 (Fig. 7b) to cross-check the DBS-derived Er; relies on standard neoclassical modeling and measured impurity flows.

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Cite this review

Pith. "Pith review of Edge Radial Electric Field in Positive and Negative Triangularity Plasmas in the TCV Tokamak." pith.science (2026). https://pith.science/paper/4YFJG5KO

@misc{pith2026250708682,
  author       = {Pith},
  title        = {Pith review of: Edge Radial Electric Field in Positive and Negative Triangularity Plasmas in the TCV Tokamak},
  year         = {2026},
  howpublished = {\url{https://pith.science/paper/4YFJG5KO}},
  note         = {Machine review of arXiv:2507.08682}
}
abstract

We present the first edge $E_r$ measurements in negative triangularity (NT) TCV plasmas. The Doppler backscattering measurements of $v_\perp \approx E_r/B$ reveal a significant impact of triangularity on the $E_r$ well: In Ohmic, NBI, and ECRH heated discharges, the $E_r$ well and associated $E_r \times B$ shear are stronger in NT-shaped plasmas compared to their positive triangularity (PT) counterpart. This suggests a connection to the concomitant NT performance gain relative to PT L-mode.

Figures

Figures reproduced from arXiv: 2507.08682 by the authors.

Figure 1
Figure 1. Contours of ρψ for the two shapes, with DBS beam paths and TS/CXRS diagnostic locations indi￾cated. −4 −2 0 v ⊥ [km/s] (a) #85429 (PT) #85430 (NT) 0.0 0.1 0.2 Ti [keV] (b) 0.85 0.90 0.95 1.00 ρψ 1 2 3 ne [1019 m −3 ] (c) 0.85 0.90 0.95 1.00 ρψ 0.0 0.1 0.2 Te [keV] (d) [PITH_FULL_IMAGE:figures/full_fig_p004_1.png] view at source ↗
Figure 3
Figure 3. (a-b) Turbulence Er×B velocity and (c-f ) edge kinetic profiles for equilibria close to those in [PITH_FULL_IMAGE:figures/full_fig_p005_3.png] view at source ↗
Figure 4
Figure 4. DBS power spectral density (PSD) comparison between NT and PT at matched density (ECRH scenarios from [PITH_FULL_IMAGE:figures/full_fig_p006_4.png] view at source ↗
Figures from the paper (3 more)
Figure 5
Figure 5. Figure 5: Plasma shapes of the higher performance scenarios. NT L PT L PT H # 82659 85890 81174 t window [s] [1.2,1.3] [0.7,0.9] [1.2,1.4] PNBI [kW] 850 850 850 Ip [kA] +150 +150 −150 B0 [T] +1.44 +1.44 −1.44 κ 1.35 1.48 1.51 δ −0.49 0.52 0.48 q95 4.0 5.7 5.1 τE [ms] 8.6 6.7 14 …
Figure 6
Figure 6. Figure 6: Kinetic profiles for the cases shown in [PITH_FULL_IMAGE:figures/full_fig_p006_6.png]
Figure 7
Figure 7. Figure 7: Edge profile comparison for the scenarios in [PITH_FULL_IMAGE:figures/full_fig_p007_7.png]

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Works this paper leans on

49 extracted references · 40 canonical work pages

  1. [1]

    Viezzer et al

    E. Viezzer et al. In: Nuclear Materials and Energy 34 (2023), p. 101308

    work page 2023

  2. [2]

    Marinoni, O

    A. Marinoni, O. Sauter, and S. Coda. In: Reviews of Modern Plasma Physics 5.1 (2021), p. 6

    work page 2021

  3. [3]

    Kikuchi et al

    M. Kikuchi et al. In: Nuclear Fusion 59.5 (2019), p. 056017

    work page 2019

  4. [4]

    Camenen et al

    Y. Camenen et al. In: Nuclear fusion 47.7 (2007), p. 510. REFERENCES 6 −2 0 2−120 −110 −100 −90 −80 PSD [dB] #82854 (PT) #82856 (NT) f0 = 55.4 GHz ρψ ≈ 0.99 k⊥ ≈ 6.0 rad/cm integrals ratio ≈ 1.5 −2 0 2 frequency [MHz] f0 = 58.0 GHz ρψ ≈ 0.97 k⊥ ≈ 6.2 rad/cm 1.3 −2 0 2 f0 = 60.0 GHz ρψ ≈ 0.94 k⊥ ≈ 6.6 rad/cm 1.5 Fig. 4: DBS power spectral density (PSD) com...

    work page 2007

  5. [5]

    M. E. Austin et al. In: Physical review letters 122.11 (2019), p. 115001

    work page 2019

  6. [6]

    Marinoni et al

    A. Marinoni et al. In: Physics of Plasmas 26.4 (2019)

    work page 2019

  7. [7]

    Coda et al

    S. Coda et al. In: Plasma Physics and Controlled Fusion 64.1 (Dec. 13, 2021), p. 014004. doi: 10. 1088/1361-6587/ac3fec

    work page 2021

  8. [8]

    Happel et al

    T. Happel et al. In: Nuclear Fusion 63.1 (Nov. 24, 2022), p. 016002. doi: 10 . 1088 / 1741 - 4326 / ac8563

    work page 2022

Show all 49 references
  1. [9]

    K. E. Thome et al. In: Plasma Physics and Controlled Fusion 66.10 (2024), p. 105018

    2024

  2. [10]

    Paz-Soldan et al

    C. Paz-Soldan et al. In: Nuclear Fusion 64.9 (2024), p. 094002

    2024

  3. [11]

    Balestri et al

    A. Balestri et al. In: Plasma Physics and Controlled Fusion 66.6 (May 2024), p. 065031. doi: 10.1088/1361-6587/ad4674

    2024 doi

  4. [12]

    Merle, O

    A. Merle, O. Sauter, and S. Y. Medvedev. In: Plasma Physics and Controlled Fusion 59.10 (2017), p. 104001

    2017

  5. [13]

    Saarelma et al

    S. Saarelma et al. In: Plasma Physics and Con- trolled Fusion 63.10 (Sept. 8, 2021), p. 105006. doi: 10.1088/1361-6587/ac1ea4

    2021 doi

  6. [14]

    A. O. Nelson, C. Paz-Soldan, and S. Saarelma. In: Nucl. Fusion 62.9 (Aug. 2022), p. 096020. issn: 0029-5515. doi: 10 . 1088 / 1741 - 4326 / ac8064

    2022

  7. [15]

    Fontana et al

    M. Fontana et al. In: Nuclear Fusion 58.2 (2017), p. 024002

    2017

  8. [16]

    Huang, S

    Z. Huang, S. Coda, et al. In: Plasma Physics and Controlled Fusion 61.1 (2018), p. 014021

    2018

  9. [17]

    Fontana et al

    M. Fontana et al. In: Nuclear Fusion 60.1 (Oct. 2019), p. 016006. doi: 10 . 1088 / 1741 - 4326 / ab4d75

    2019

  10. [18]

    Han et al

    W. Han et al. In: Nuclear Fusion 61.3 (2021), p. 034003

    2021

  11. [19]

    Krutkin et al

    O. Krutkin et al. In: Nuclear Fusion 64.2 (Jan. 2024), p. 026010. doi: 10 . 1088 / 1741 - 4326 / ad15b1

    2024

  12. [20]

    S. D. Stewart et al. In: Plasma Physics and Controlled Fusion 67.2 (2025), p. 025032

    2025

  13. [21]

    Marinoni et al

    A. Marinoni et al. In: Plasma Physics and Controlled Fusion 51.5 (2009), p. 055016

    2009

  14. [22]

    Merlo et al

    G. Merlo et al. In: Plasma Physics and Controlled Fusion 63.4 (2021), p. 044001

    2021

  15. [23]

    Merlo et al

    G. Merlo et al. In: Physics of Plasmas 30.10 (Oct. 2023), p. 102302. issn: 1070-664X. doi: 10.1063/5.0167292

    2023 doi

  16. [24]

    Di Giannatale et al

    G. Di Giannatale et al. In: Plasma Physics and Controlled Fusion 66.9 (July 2024), p. 095003. doi: 10.1088/1361-6587/ad5df9

    2024 doi

  17. [25]

    Balestri et al

    A. Balestri et al. In: Plasma Physics and Controlled Fusion 66.7 (May 2024), p. 075012. doi: 10.1088/1361-6587/ad4d1d

    2024 doi

  18. [26]

    Garbet et al

    X. Garbet et al. In: Nuclear Fusion (2024)

    2024

  19. [27]

    Ulbl et al

    P. Ulbl et al. In: arXiv preprint arXiv:2504.00475 (2025)

    2025 arXiv

  20. [28]

    A. O. Nelson et al. In: Plasma Physics and Controlled Fusion 66.10 (Sept. 2024), p. 105014. doi: 10.1088/1361-6587/ad6a83

    2024 doi

  21. [29]

    Sauter et al

    O. Sauter et al. In: Physics of Plasmas 21.5 (2014)

    2014

  22. [30]

    Biglari, P

    H. Biglari, P. H. Diamond, and P. W. Terry. In: Physics of Fluids B: Plasma Physics 2.1 (Jan. 1990), pp. 1–4. doi: 10.1063/1.859529

    1990 doi

  23. [31]

    K. H. Burrell. In: Physics of Plasmas 4.5 (May 1997), pp. 1499–1518. issn: 1070-664X. doi: 10. 1063 / 1 . 872367. eprint: https : / / pubs . aip . org / aip / pop / article - pdf / 4 / 5 / 1499 / 19309400/1499\_1\_online.pdf. REFERENCES 8

    1997

  24. [32]

    B. P. Duval et al. In: Nuclear Fusion 64.11 (2024), p. 112023

    2024

  25. [33]

    Vanovac et al

    B. Vanovac et al. In: Plasma Physics and Controlled Fusion 66.11 (Sept. 2024), p. 115005. doi: 10.1088/1361-6587/ad76d7

    2024 doi

  26. [34]

    Hirsch et al

    M. Hirsch et al. In: Plasma Phys. Control. Fusion 43.12 (Oct. 2001), p. 1641. issn: 0741-3335. doi: 10.1088/0741-3335/43/12/302

    2001 doi

  27. [35]

    Hennequin et al

    P. Hennequin et al. In: Nuclear Fusion 46.9 (Aug. 17, 2006), S771–S779. doi: 10 . 1088 / 0029-5515/46/9/s12

    2006

  28. [36]

    Rien¨ acker et al

    S. Rien¨ acker et al. In: Plasma Phys. Contr. F. 67.6 (2025), p. 065003

    2025

  29. [37]

    Sauter and S

    O. Sauter and S. Y. Medvedev. In: Computer Physics Communications 184.2 (2013), pp. 293– 302

    2013

  30. [38]

    Blanchard et al

    P. Blanchard et al. en. In: Journal of Instrumen- tation 14.10 (Oct. 2019), p. C10038. issn: 1748-

    2019

  31. [39]

    Bagnato et al

    F. Bagnato et al. In: Nuclear Fusion 63.5 (2023), p. 056006

    2023

  32. [40]

    A. N. Karpushov et al. In: Fusion Engineering and Design . Proceeding of the 25th Symposium on Fusion Technology 84.2 (June 2009), pp. 993–

    2009

  33. [41]

    E. A. Belli and J. Candy. en. In: Plasma Physics and Controlled Fusion 50.9 (July 2008), p. 095010. issn: 0741-3335. doi: 10.1088/0741- 3335/50/9/095010

    2008 doi

  34. [42]

    ITER et al

    E. ITER et al. In: Nuclear Fusion 39.12 ITER physics basis (1999), pp. 2175–2249

    1999

  35. [43]

    Vermare et al

    L. Vermare et al. In: Nucl. Fusion 62.2 (Dec. 16, 2021), p. 026002. doi: 10 . 1088 / 1741 - 4326 / ac3c85

    2021

  36. [44]

    Varennes et al

    R. Varennes et al. en. In: Plasma Physics and Controlled Fusion 66.2 (Dec. 2023), p. 025003. issn: 0741-3335. doi: 10 . 1088 / 1361 - 6587 / ad1653

    2023

  37. [45]

    Z. Huang. PhD thesis. Swiss Federal Institute of Technology EPFL, 2017

    2017

  38. [46]

    Schirmer et al

    J. Schirmer et al. In: Nucl. Fusion 46.9 (Aug. 2006), S780. issn: 0029-5515. doi: 10 . 1088 / 0029-5515/46/9/S13

    2006

  39. [47]

    Plank et al

    U. Plank et al. In: Phys. Plasmas 30.4 (Apr. 2023), p. 042513. issn: 1070-664X. doi: 10 . 1063/5.0102763

    2023

  40. [221]

    doi: 10.1088/1748-0221/14/10/C10038

    doi

  41. [997]

    issn: 0920-3796. doi: 10 . 1016 / j . fusengdes.2008.12.006

    2008

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