Optimization of the reconstruction algorithm in triple-GEM detector

被引：0

作者：

Cossio, F. ^{[1
,8
]}

Alexeev, M. ^{[1
]}

Amoroso, A. ^{[1
,11
]}

Ferroli, R. Baldini ^{[3
,6
]}

Balossino, I ^{[2
,6
]}

Bertani, M. ^{[3
]}

Bettoni, D. ^{[2
]}

Bianchi, F. ^{[1
,11
]}

Bortone, A. ^{[1
,11
]}

Calcaterra, A. ^{[3
]}

Canale, N. ^{[9
]}

Capodiferro, M. ^{[3
,5
]}

Cassariti, V ^{[2
]}

Cerioni, S. ^{[3
]}

Chai, J. ^{[1
,6
,8
]}

Cheng, W. ^{[1
,6
,8
]}

Chiozzi, S. ^{[2
]}

Cibinetto, G. ^{[2
]}

Ramusino, A. Cotta ^{[2
]}

Cotto, G. ^{[1
,11
]}

De Mori, F. ^{[1
,11
]}

Destefanis, M. ^{[1
,11
]}

Dong, J. ^{[3
]}

Evangelisti, F. ^{[2
]}

Farinelli, R. ^{[2
,9
]}

Fava, L. ^{[1
]}

Felici, G. ^{[3
]}

Fioravanti, E. ^{[2
]}

Garzia, I ^{[2
,9
]}

Gatta, M. ^{[3
]}

Giraudo, G. ^{[1
]}

Greco, M. ^{[1
,11
]}

Lavezzi, L. ^{[1
,6
]}

Leng, C. ^{[1
,6
,8
]}

Li, H. ^{[1
,6
]}

Maggiora, M. ^{[1
,11
]}

Malaguti, R. ^{[2
]}

Mangoni, A. ^{[4
,10
]}

Marcello, S. ^{[1
,11
]}

Melchiorri, M. ^{[2
]}

Mezzadri, G. ^{[2
,9
]}

Mignone, M. ^{[1
]}

Morello, G. ^{[3
]}

Pacetti, S. ^{[4
,10
]}

Patteri, P. ^{[3
]}

Pellegrino, J. ^{[1
,11
]}

Pelosi, A. ^{[3
,5
]}

Rivetti, A. ^{[1
]}

Rolo, M. Da Rocha ^{[1
]}

Savrie, M. ^{[2
,9
]}

机构：

[1] Ist Nazl Fis Nucl, Sez Torino, Turin, Italy

[2] Ist Nazl Fis Nucl, Sez Ferrara, Ferrara, Italy

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

[4] Ist Nazl Fis Nucl, Sez Perugia, Perugia, Italy

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

[6] Inst High Energy Phys, Beijing, Peoples R China

[7] Joint Inst Nucl Res JINR, Dubna, Russia

[8] Politecn Torino, Turin, Italy

[9] Univ Ferrara, Ferrara, Italy

[10] Univ Perugia, Perugia, Italy

[11] Univ Torino, Turin, Italy

来源：

2018 IEEE NUCLEAR SCIENCE SYMPOSIUM AND MEDICAL IMAGING CONFERENCE PROCEEDINGS (NSS/MIC) | 2018年

关键词：

Reconstruction algorithms; mu TPC; tracking detectors; GEM; Micro Pattern Gas Detectors;

D O I：

暂无

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

Gas detectors are very light instruments used in high energy physics to measure the particle properties: position and momentum. Gas Electron Multiplier (GEM) technology has been invented by F. Sauli in 1997 and in the past tens of years the knowledge of this Micro Pattern Gas Detector (MPGD) increased. A design with a triple-GEM has been used in several experiments in high energy physics such as TOTEM and COMPASS. This technology allows to achieve good spatial resolution performances and can be used to create large area detector with a shapeable surface, e.g. the KLOE2 Inner Tracker or the upcoming upgrade of the BESIII Inner Tracker. A triple-GEM uses three stages of GEMs, with high electric field, to amplify the number of the electrons produced by the primary ionization of the charged particle passing in the gas, with a total gain of about 10(4). The signal is then collected on a segmented anode and dedicated algorithms are used to reconstruct the charged particle position. The measurement of both the time and the charge information on the anode strip allows to use two algorithms: the Charge Centroid and the micro-Time Projection Chamber readout. The CC is strongly performing with orthogonal tracks while the mu TPC gives its best results if magnetic field or if non-orthogonal tracks are present. These reconstruction methods are anti-correlated and the combination of the two is needed to keep the spatial resolution stable between the regions with different performances. A beam test with planar triple-GEM has been performed and in this presentation the merging algorithm of the CC and mu TPC as a function of the charge and the multiplicity of the signal will be shown: a stable spatial resolution of about 130 mu m has been achieved. In addition to this, the impact of the transversal and longitudinal diffusions on the reconstruction in mu TPC mode will be shown, as well as the inter-strip capacitance effect.

引用

页数：5

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