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Title: Performance of 0. 75 mm pitch MWPC'S operating at high rate

Abstract

Three Multiwire Proportional Chambers (MWPC) with high rate capability have been constructed for Fermi National Accelerator Laboratory experiment 705 (Charmonium and Direct Photon production by ..pi../sup +-/, p and /bar p/ at 300 GeV/c). Each chamber, with a sensitive area of 308 cm/sup 2/, consists of three anode planes, wound with 12.5 ..mu..m diameter gold-plated tungsten/rhenium wire, facing 25 ..mu..m graphite-coated kapton cathode planes at a distance of 3 mm. Wire spacing in two of the MWPC (PC-B1 and PC-B2) is 0.75 mm and 1.00 mm in the third one (PC-B3). After a few weeks of running on ''Magic Gas'' with a beam flux of up to /approximately/10/sup 7/ particles/cm/sup 2/sec, severe damage occurred to the graphite coating. All cathode planes were replaced by aluminized kapton, and the chambers worked successfully for the next 3 months until the end of the run, when a 10% efficiency drop was observed after a total accumulated charge of /approximately/1 C/cm of sense wire. After the end of the run the chambers were disassembled and inspected. A white deposit with a characteristic ''wire pattern'' etched away from the Al coating was observed in the region of the beam spot. 10 refs., 8 figs., 1more » tab.« less

Authors:
; ; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Fermi National Accelerator Lab., Batavia, IL (USA)
OSTI Identifier:
6468978
Report Number(s):
FNAL/C-89/21-E; CONF-881103-47
ON: DE89007483; TRN: 89-008583
DOE Contract Number:  
AC02-76CH03000
Resource Type:
Conference
Resource Relation:
Conference: IEEE nuclear science symposium, Orlando, FL, USA, 9 Nov 1988; Other Information: Portions of this document are illegible in microfiche products
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; MULTIWIRE PROPORTIONAL CHAMBERS; PERFORMANCE TESTING; DESIGN; FERMILAB ACCELERATOR; PHYSICAL RADIATION EFFECTS; ACCELERATORS; CYCLIC ACCELERATORS; MEASURING INSTRUMENTS; PROPORTIONAL COUNTERS; RADIATION DETECTORS; RADIATION EFFECTS; SYNCHROTRONS; TESTING; 440104* - Radiation Instrumentation- High Energy Physics Instrumentation

Citation Formats

Conetti, S, Kuzminski, J, Marchionni, A, Stairs, D, Arenton, M, Chen, T Y, Cox, B, Delchamps, S, Etemadi, B, and Fortney, L. Performance of 0. 75 mm pitch MWPC'S operating at high rate. United States: N. p., 1989. Web.
Conetti, S, Kuzminski, J, Marchionni, A, Stairs, D, Arenton, M, Chen, T Y, Cox, B, Delchamps, S, Etemadi, B, & Fortney, L. Performance of 0. 75 mm pitch MWPC'S operating at high rate. United States.
Conetti, S, Kuzminski, J, Marchionni, A, Stairs, D, Arenton, M, Chen, T Y, Cox, B, Delchamps, S, Etemadi, B, and Fortney, L. 1989. "Performance of 0. 75 mm pitch MWPC'S operating at high rate". United States. https://www.osti.gov/servlets/purl/6468978.
@article{osti_6468978,
title = {Performance of 0. 75 mm pitch MWPC'S operating at high rate},
author = {Conetti, S and Kuzminski, J and Marchionni, A and Stairs, D and Arenton, M and Chen, T Y and Cox, B and Delchamps, S and Etemadi, B and Fortney, L},
abstractNote = {Three Multiwire Proportional Chambers (MWPC) with high rate capability have been constructed for Fermi National Accelerator Laboratory experiment 705 (Charmonium and Direct Photon production by ..pi../sup +-/, p and /bar p/ at 300 GeV/c). Each chamber, with a sensitive area of 308 cm/sup 2/, consists of three anode planes, wound with 12.5 ..mu..m diameter gold-plated tungsten/rhenium wire, facing 25 ..mu..m graphite-coated kapton cathode planes at a distance of 3 mm. Wire spacing in two of the MWPC (PC-B1 and PC-B2) is 0.75 mm and 1.00 mm in the third one (PC-B3). After a few weeks of running on ''Magic Gas'' with a beam flux of up to /approximately/10/sup 7/ particles/cm/sup 2/sec, severe damage occurred to the graphite coating. All cathode planes were replaced by aluminized kapton, and the chambers worked successfully for the next 3 months until the end of the run, when a 10% efficiency drop was observed after a total accumulated charge of /approximately/1 C/cm of sense wire. After the end of the run the chambers were disassembled and inspected. A white deposit with a characteristic ''wire pattern'' etched away from the Al coating was observed in the region of the beam spot. 10 refs., 8 figs., 1 tab.},
doi = {},
url = {https://www.osti.gov/biblio/6468978}, journal = {},
number = ,
volume = ,
place = {United States},
year = {1989},
month = {1}
}

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