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Title: A GEM readout with radial zigzag strips and linear charge-sharing response

Here, we study the position sensitivity of radial zigzag strips intended to read out large GEM detectors for tracking at future experiments. Zigzag strips can cover a readout area with fewer strips than regular straight strips while maintaining good spatial resolution. Consequently, they can reduce the number of required electronic channels and related cost for large-area GEM detector systems. A non-linear relation between incident particle position and hit position measured from charge sharing among zigzag strips was observed in a previous study. We significantly reduce this non-linearity by improving the interleaving of adjacent physical zigzag strips. Zigzag readout structures are implemented on PCBs and on a flexible foil and are tested using a 10 cm × 10 cm triple-GEM detector scanned with a strongly collimated X-ray gun on a 2D motorized stage. Lastly, angular resolutions of 60–84 μrad are achieved with a 1.37 mrad angular strip pitch at a radius of 784 mm. On a linear scale this corresponds to resolutions below 100 μm.
Authors:
 [1] ;  [1] ;  [2] ;  [2] ;  [2]
  1. Florida Institute of Technology, Melbourne, FL (United States). Department of Physics and Space Sciences
  2. Brookhaven National Lab. (BNL), Upton, NY (United States). Physics Department
Publication Date:
Report Number(s):
BNL-200040-2018-JAAM
Journal ID: ISSN 0168-9002; TRN: US1801976
Grant/Contract Number:
SC0012704
Type:
Accepted Manuscript
Journal Name:
Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment
Additional Journal Information:
Journal Volume: 887; Journal Issue: C; Journal ID: ISSN 0168-9002
Publisher:
Elsevier
Research Org:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Org:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; GEM; zigzag; readout
OSTI Identifier:
1424954

Zhang, Aiwu, Hohlmann, Marcus, Azmoun, Babak, Purschke, Martin L., and Woody, Craig. A GEM readout with radial zigzag strips and linear charge-sharing response. United States: N. p., Web. doi:10.1016/j.nima.2017.12.074.
Zhang, Aiwu, Hohlmann, Marcus, Azmoun, Babak, Purschke, Martin L., & Woody, Craig. A GEM readout with radial zigzag strips and linear charge-sharing response. United States. doi:10.1016/j.nima.2017.12.074.
Zhang, Aiwu, Hohlmann, Marcus, Azmoun, Babak, Purschke, Martin L., and Woody, Craig. 2018. "A GEM readout with radial zigzag strips and linear charge-sharing response". United States. doi:10.1016/j.nima.2017.12.074.
@article{osti_1424954,
title = {A GEM readout with radial zigzag strips and linear charge-sharing response},
author = {Zhang, Aiwu and Hohlmann, Marcus and Azmoun, Babak and Purschke, Martin L. and Woody, Craig},
abstractNote = {Here, we study the position sensitivity of radial zigzag strips intended to read out large GEM detectors for tracking at future experiments. Zigzag strips can cover a readout area with fewer strips than regular straight strips while maintaining good spatial resolution. Consequently, they can reduce the number of required electronic channels and related cost for large-area GEM detector systems. A non-linear relation between incident particle position and hit position measured from charge sharing among zigzag strips was observed in a previous study. We significantly reduce this non-linearity by improving the interleaving of adjacent physical zigzag strips. Zigzag readout structures are implemented on PCBs and on a flexible foil and are tested using a 10 cm × 10 cm triple-GEM detector scanned with a strongly collimated X-ray gun on a 2D motorized stage. Lastly, angular resolutions of 60–84 μrad are achieved with a 1.37 mrad angular strip pitch at a radius of 784 mm. On a linear scale this corresponds to resolutions below 100 μm.},
doi = {10.1016/j.nima.2017.12.074},
journal = {Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment},
number = C,
volume = 887,
place = {United States},
year = {2018},
month = {1}
}