Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
Development of the micro-RWELL discs for the CMD-3 detector. / Fedotovich, G.; Kudryavtsev, V.; Shekhtman, L.
в: Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Том 1041, 167316, 11.10.2022.Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
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TY - JOUR
T1 - Development of the micro-RWELL discs for the CMD-3 detector
AU - Fedotovich, G.
AU - Kudryavtsev, V.
AU - Shekhtman, L.
N1 - Funding Information: This work is partially supported by the Russian Foundation for Basic Research grants 20-02-00496 and 20-52-00008 . Publisher Copyright: © 2022 Elsevier B.V.
PY - 2022/10/11
Y1 - 2022/10/11
N2 - The CMD-3 is general purpose detector at the VEPP-2000 electron–positron collider at Budker Institute of Nuclear Physics. CMD-3 is intended to measure parameters of light vector mesons and main hadronic cross sections with accuracy better than 1% and study dynamics of multihadron production. In order to increase geometrical acceptance for charged particles and to improve precision of track polar angle measurements the end-cap discs based on micro-resistive-WELL (μ-RWELL) structures are proposed for the upgrade of the CMD-3 tracking system. Two μ-RWELL discs 50 cm in diameter were assembled and tested. The discs have two-layer readout structure with the top layer of quarter-rings with 2 mm pitch in radius and the bottom layer of sectors with average angular pitch of about 0.3 degrees. The quarter-rings occupy only 50% of the disc surface due to gaps between them, thus, allowing the signal to be induced on the bottom layer. The kapton foil with copper layer on top and high-resistivity DLC layer at the bottom, pierced with 80 micron diameter holes located at 140 micron from each other, is glued on top of the readout structure. With the first disc the manufacturer (CERN advanced PCB Workshop) could not reach proper insulation between the copper layer and the DLC and the copper was etched out leaving the disc with thin Ni–Cr adhesion layer on top. The second disc has copper layer on top of the μ-RWELL structure. The readout structure of the discs is connected to front-end electronics based on VMM3a ASICS. The results of study of the main parameters of the detectors with front-end electronics are reported in the paper.
AB - The CMD-3 is general purpose detector at the VEPP-2000 electron–positron collider at Budker Institute of Nuclear Physics. CMD-3 is intended to measure parameters of light vector mesons and main hadronic cross sections with accuracy better than 1% and study dynamics of multihadron production. In order to increase geometrical acceptance for charged particles and to improve precision of track polar angle measurements the end-cap discs based on micro-resistive-WELL (μ-RWELL) structures are proposed for the upgrade of the CMD-3 tracking system. Two μ-RWELL discs 50 cm in diameter were assembled and tested. The discs have two-layer readout structure with the top layer of quarter-rings with 2 mm pitch in radius and the bottom layer of sectors with average angular pitch of about 0.3 degrees. The quarter-rings occupy only 50% of the disc surface due to gaps between them, thus, allowing the signal to be induced on the bottom layer. The kapton foil with copper layer on top and high-resistivity DLC layer at the bottom, pierced with 80 micron diameter holes located at 140 micron from each other, is glued on top of the readout structure. With the first disc the manufacturer (CERN advanced PCB Workshop) could not reach proper insulation between the copper layer and the DLC and the copper was etched out leaving the disc with thin Ni–Cr adhesion layer on top. The second disc has copper layer on top of the μ-RWELL structure. The readout structure of the discs is connected to front-end electronics based on VMM3a ASICS. The results of study of the main parameters of the detectors with front-end electronics are reported in the paper.
KW - Micro-pattern gas detectors
KW - Micro-RWELL
KW - Tracking detectors
UR - http://www.scopus.com/inward/record.url?scp=85136212178&partnerID=8YFLogxK
U2 - 10.1016/j.nima.2022.167316
DO - 10.1016/j.nima.2022.167316
M3 - Article
AN - SCOPUS:85136212178
VL - 1041
JO - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
JF - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
SN - 0168-9002
M1 - 167316
ER -
ID: 36958205