A GEM-TPC in twin configuration for the Super-FRS tracking of heavy ions at FAIR

6533b7d4fe1ef96bd1262053

RESEARCH PRODUCT

A GEM-TPC in twin configuration for the Super-FRS tracking of heavy ions at FAIR

C. Caesar C. Simons Ari Jokinen J. Kunkel Tuomas Grahn J. Hoffmann A. Prochazka H. Heggen Sami Rinta-antila Bernd Voss R. Turpeinen M. Winkler Harvey A. Risch N. Kurz C. Kaya Herbert A. Simon Francisco Garcia C. Nociforo I. Rusanov C. J. Schmidt Juha ÄYstö

subject

radioactive ion beam Nuclear and High Energy Physics Proton fragment separator Physics::Instrumentation and Detectors super-FRS chemistry.chemical_element Tracking (particle physics)01 natural sciences 7. Clean energy Particle identification GSI Xenon Optics 0103 physical sciences seuranta Nuclear Experiment 010306 general physics Instrumentation Image resolution Physics Time projection chamber ta114 010308 nuclear & particles physics Projectile business.industry tracking fair time projection chamber beam adjustment chemistry gas electron multiplier Gas electron multiplier business

description

The GEM-TPC [1] described herein will be part of the standard beam-diagnostics equipment of the Super-FRS [2] . This chamber will provide tracking information for particle identification at rates up to 1 MHz on an event-by-event basis. The key requirements of operation for these chambers are: close to 100% tracking efficiency under conditions of high counting rate, spatial resolution below 1 mm and a superb large dynamic range covering projectiles from Z=1 up to Z=92. The current prototype consists of two GEM-TPCs inside a single vessel, which are operating independently and have electrical drift fields in opposite directions. The twin configuration is done by flipping one of the GEM-TPCs on the middle plane with respect to the second one. In order to put this development in context, the evolution of previous prototypes will be described and its performances discussed. Finally, this chamber was tested at the University of Jyväskylä accelerator with proton projectiles and at GSI with Uranium, Xenon, fragments and Carbon beams. The results obtained have shown a position resolution between 120 to 300 μm at moderate counting rate under conditions of full tracking efficiency. peerReviewed

year	journal	country	edition	language
2018-03-01	Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

https://doi.org/10.1016/j.nima.2017.11.088