Update of the frictional cooling studies at Nevis Labs

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Presentation transcript:

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

Frictional Cooling: The idea Cool m’s where dE/dx a band 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

Frictional Cooling : particle trajectory calculated with continuous energy loss Feb. 5, 2002 R. Galea IIT/FNAL

Frictional Cooling: stop the m need low initial m momenta Feb. 5, 2002 R. Galea IIT/FNAL

Frictional Cooling Scheme Optimize: target, phase rotation & cooling channel Feb. 5, 2002 R. Galea IIT/FNAL

Target System: study II Feb. 5, 2002 R. Galea IIT/FNAL

Experimental Work at Nevis We want to measure the energy loss, the m- scapture, test cooling principle Feb. 5, 2002 R. Galea IIT/FNAL

Feb. 5, 2002 R. Galea IIT/FNAL

MultiWire Proportional Chamber Single Wire prototype constructed, tested with P10 Ongoing: Multiwire, use Xe gas. Feb. 5, 2002 R. Galea IIT/FNAL

MicroChannelPlate MCP used to measure ms & e Use a,b,g sources in 4 MeV p beam at Nevis & 10-40 KeV m beam at PSI MCP: front side Accelerating grid