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Published byDerrick McCarthy Modified over 6 years ago
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Update of the frictional cooling studies at Nevis Labs
R. Galea Columbia University A. Caldwell (Columbia) S. Schlenstedt (DESY/Zeuthen) H. Abramowicz (TAU) Columbia Summer Students: C. Georgiou D. Greenwald Y, Ning W. Serber I. Shpiro
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Frictional Cooling: The idea
Cool m’s where dE/dx a band compensate energy loss through E-field: cooling Below ionization peak dE/dx is dominated by: nuclear recoil excitation m+ charge exchange, & m- capture Issues/consequences/comments: large dE/dx : work with low density gas With we will never get below the peak therefore apply Feb. 5, 2002 R. Galea IIT/FNAL
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Frictional Cooling : particle trajectory
calculated with continuous energy loss Feb. 5, 2002 R. Galea IIT/FNAL
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Frictional Cooling: stop the m
need low initial m momenta Feb. 5, 2002 R. Galea IIT/FNAL
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Frictional Cooling Scheme
Optimize: target, phase rotation & cooling channel Feb. 5, 2002 R. Galea IIT/FNAL
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Target System: study II
Feb. 5, 2002 R. Galea IIT/FNAL
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Experimental Work at Nevis
We want to measure the energy loss, the m- scapture, test cooling principle Feb. 5, 2002 R. Galea IIT/FNAL
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Feb. 5, 2002 R. Galea IIT/FNAL
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MultiWire Proportional Chamber
Single Wire prototype constructed, tested with P10 Ongoing: Multiwire, use Xe gas. Feb. 5, 2002 R. Galea IIT/FNAL
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MicroChannelPlate MCP used to measure ms & e
Use a,b,g sources in 4 MeV p beam at Nevis & KeV m beam at PSI MCP: front side Accelerating grid
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