dorsal/arxiv
View SchemaMicromegas TPC studies at high magnetic fields using the charge dispersion signal
| Authors | M. Dixit, D. Attie, A. Bellerive, K. Boudjemline, P. Colas, P. Giganon, I. Giomataris, V. Lepeltier, S. Liu, J. -P. Martin, K. Sachs, Y. Shin, S. Turnbull |
|---|---|
| Categories | |
| ArXiv ID | physics/0703243 |
| URL | https://arxiv.org/abs/physics/0703243 |
| DOI | 10.1016/j.nima.2007.07.099 |
| Journal | Nucl.Instrum.Meth.A581:254-257,2007 |
Abstract
The International Linear Collider (ILC) Time Projection Chamber (TPC) transverse space-point resolution goal is 100 microns for all tracks including stiff 90 degree tracks with the full 2 meter drift. A Micro Pattern Gas Detector (MPGD) readout TPC can achieve the target resolution with existing techniques using 1 mm or narrower pads at the expense of increased detector cost and complexity. The new MPGD readout technique of charge dispersion can achieve good resolution without resorting to narrow pads. This has been demonstrated previously for 2 mm x 6 mm pads with GEMs and Micromegas in cosmic ray tests and in a KEK beam test in a 1 Tesla magnet. We have recently tested a Micromegas-TPC using the charge dispersion readout concept in a high field super-conducting magnet at DESY. The measured Micromegas gain was found to be constant within 0.5% for magnetic fields up to 5 Tesla. With the strong suppression of transverse diffusion at high magnetic fields, we measure a flat 50 micron resolution at 5 Tesla over the full 15 cm drift length of our prototype TPC.
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"abstract": "The International Linear Collider (ILC) Time Projection Chamber (TPC)\ntransverse space-point resolution goal is 100 microns for all tracks including\nstiff 90 degree tracks with the full 2 meter drift. A Micro Pattern Gas\nDetector (MPGD) readout TPC can achieve the target resolution with existing\ntechniques using 1 mm or narrower pads at the expense of increased detector\ncost and complexity. The new MPGD readout technique of charge dispersion can\nachieve good resolution without resorting to narrow pads. This has been\ndemonstrated previously for 2 mm x 6 mm pads with GEMs and Micromegas in cosmic\nray tests and in a KEK beam test in a 1 Tesla magnet. We have recently tested a\nMicromegas-TPC using the charge dispersion readout concept in a high field\nsuper-conducting magnet at DESY. The measured Micromegas gain was found to be\nconstant within 0.5% for magnetic fields up to 5 Tesla. With the strong\nsuppression of transverse diffusion at high magnetic fields, we measure a flat\n50 micron resolution at 5 Tesla over the full 15 cm drift length of our\nprototype TPC.",
"arxiv_id": "physics/0703243",
"authors": [
"M. Dixit",
"D. Attie",
"A. Bellerive",
"K. Boudjemline",
"P. Colas",
"P. Giganon",
"I. Giomataris",
"V. Lepeltier",
"S. Liu",
"J. -P. Martin",
"K. Sachs",
"Y. Shin",
"S. Turnbull"
],
"categories": [
"physics.ins-det"
],
"doi": "10.1016/j.nima.2007.07.099",
"journal_ref": "Nucl.Instrum.Meth.A581:254-257,2007",
"title": "Micromegas TPC studies at high magnetic fields using the charge dispersion signal",
"url": "https://arxiv.org/abs/physics/0703243"
},
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