CJC2 current history, normalized to September fit, after offset and SynRad subtraction:
The exponential line is drawn to guide the eye.
CJC2 current vs beam currents. Latest version:
CJC2 current vs beam currents. Nov version:
CJC2 current vs beam currents. Oct/Nov 2002:
CJC2 current vs beam currents. June through September 2002:
CJC currents (at full HV: anode surface field 28.25 kV/mm) versus beam current.
Data from 2000: one entry per CDAQ run for Ip > 70 mA.
Thanks to Claus Kleinwort for the n-tuple.
Data from 2002 for single-beam test runs and ep colliding beam runs.
The e+-only run from Sat 18.5. at 5.7 mA is very promising!
The CJC2 current during beam steering:
Attempts to reproduce it at 12 mA failed due to vacuum problems, but will continue.
Some 'quality regions' for CJC1 currents from 2000 by Carsten Niebuhr:
The ageing limit is explained here.
Mon 27.5.02 e+ beam:
Collimator steering:
Radiation monitor:
The sharp drop at -9.3 hours (=0:20) is due to beam steering with a horizontal 3-coil bumps North Left, moving the beam inwards by several mm in the GJ magnet.
Spacal rates show the same drop:
At 1:00 the CJC2 was at full HV and further studies were done:
At 11 mA a current of 40 micro A was reached:
