Stability and detection performance of a GEM-based Optical Readout TPC with He/CF4 gas mixtures

被引：10

作者：

Baracchini, E. ^{[1
,2
]}

Benussi, L. ^{[3
]}

Bianco, S. ^{[3
]}

Capoccia, C. ^{[3
]}

Caponero, M. ^{[3
,4
]}

Cavoto, G. ^{[5
,6
]}

Cortez, A. ^{[1
,2
]}

Costa, I. A. ^{[7
]}

Di Marco, E. ^{[5
]}

D'Imperio, G. ^{[5
]}

Dho, G. ^{[1
,2
]}

Iacoangeli, F. ^{[5
]}

Maccarrone, G. ^{[3
]}

Marafini, M. ^{[5
,8
,9
]}

Mazzitelli, G. ^{[3
]}

Messina, A. ^{[5
,6
]}

Nobrega, R. A. ^{[7
]}

Orlandi, A. ^{[3
]}

Paoletti, E. ^{[3
]}

Passamonti, L. ^{[3
]}

Petrucci, F. ^{[10
,11
]}

Piccolo, D. ^{[3
]}

Pierluigi, D. ^{[3
]}

Pinci, D. ^{[5
]}

Renga, F. ^{[5
]}

Rosatelli, F. ^{[3
]}

Russo, A. ^{[3
]}

Saviano, G. ^{[3
,12
]}

Tomassini, S. ^{[3
]}

机构：

[1] Gran Sasso Sci Inst, Laquila, Italy

[2] Ist Nazl Fis Nucl, Lab Nazl Gran Sasso, Assergi, Italy

[3] Ist Nazl Fis Nucl, Lab Nazl Frascati, Frascati, Italy

[4] ENEA Ctr Ric Frascati, Frascati, Italy

[5] Ist Nazl Fis Nucl, Sez Roma, Rome, Italy

[6] Sapienza Univ Roma, Dipartimento Fis, Rome, Italy

[7] Univ Fed Juiz de Fora, Juiz De Fora, Brazil

[8] Museo Stor Fis, Piazza Viminale 1, Rome, Italy

[9] Ctr Studi & Ric Enrico Fermi, Piazza Viminale 1, Rome, Italy

[10] Univ Roma TRE, Dipartimento Matemat & Fis, Rome, Italy

[11] Ist Nazl Fis Nucl, Sez Roma TRE, Rome, Italy

[12] Sapienza Univ Roma, Dipartimento Ingn Chim Mat & Ambiente, Rome, Italy

来源：

JOURNAL OF INSTRUMENTATION | 2020年 / 15卷 / 10期

基金：

欧洲研究理事会;

关键词：

Dark Matter detectors (WIMPs; axions etc.); Gaseous imaging and tracking detectors; Micropattern gaseous detectors (MSGC; GEM; THGEM; RETHGEM; MHSP; MICROPIC; MICROMEGAS; InGrid etc); Time projection Chambers (TPC); SCINTILLATION;

D O I：

10.1088/1748-0221/15/10/P10001

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

The performance and long term stability of an optically readout Time Projection Chamber with an electron amplification structure based on three Gas Electron Multipliers was studied. He/CF4 based gas mixtures were used in two different proportions (60/40 and 70/30) in a CYGNO prototype with 7 litres sensitive volume. With electrical configurations providing very similar electron gains, an almost full detection efficiency in the whole detector volume was found with both mixtures, while a light yield about 20% larger for the 60/40 was found. The electrostatic stability was tested by monitoring voltages and currents during 25 days. The detector worked in very stable and safe condition for the whole period. In the presence of less CF4, a larger probability of unstable events was clearly detected.

引用

页数：15

共 28 条

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