Combination of two Gas Electron Multipliers and a Micromegas as gain elements for a time projection chamber
- Yale Univ., New Haven, CT (United States)
- Univ. of Texas, Austin, TX (United States)
We measured the properties of a novel combination of two Gas Electron Multipliers with a Micromegas for use as amplification devices in high-rate gaseous time projection chambers. The goal of this design is to minimize the buildup of space charge in the drift volume of such detectors in order to eliminate the standard gating grid and its resultant dead time, while preserving good tracking and particle identification performance. To characterize this micro-pattern gas detector configuration, we measured the positive ion back-flow and energy resolution at various element gains and electric fields, using a variety of gases, and additionally studied crosstalk effects and discharge rates. At a gain of 2000, this configuration achieves an ion back-flow below 0.4% and an energy resolution better than for 55Fe X-rays.
- Research Organization:
- Univ. of Texas, Austin, TX (United States); Univ. of Tennessee, Knoxville, TN (United States); Brookhaven National Laboratory (BNL), Upton, NY (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Nuclear Physics (NP)
- Grant/Contract Number:
- SC0003892; SC0013391; SC0014550; AC02-98CH10886; SC004168; 200935; 4000132727
- OSTI ID:
- 1534155
- Alternate ID(s):
- OSTI ID: 1375961
- Journal Information:
- Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 834; ISSN 0168-9002
- Publisher:
- ElsevierCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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