Minutes of the Accelerator Physics Group meeting
12/06/01
Present: J. Wei, J. Galambos, S. Henderson, J. Holmes, S. Danilov, 
S. Cousineau, S. Aleksandrov, D. Jeon, E. Tanke, P. Chu. A. Shishlo,
S. Assadi, 


J. Wei noted that B. Weng had resigned the BNL STL position. New
candidates are J. Wei and M. Harrison. The transition will occur by March. 

The use of a bunch shape monitor was discussed. The parameters for this 
diagnostice need to be specified by AP (i.e. where it is 
needed, bandwidth, etc.). C. Diebele is deisgning a Faraday cup for use
at the end of the MEBT, for short pulses (survivibility is a concern.
The BSM may also serve as a transverse profile measurement.

A proposal for scraping is needed. The thought now is: add a scraper at the 
LEBT exit, in the MEBT use the chopper target + 2 more scrapers at an angle.
 Also scraping at the antichopper is a possibility. If needed, a scrapper in 
the firsst DTL tube is the last choice.


A. Shishlo presented a virtual accelerator for applications program testing.
 It uses a portable channel access server to provide the same EPICS interface
 as the real machine (propoer PV names). It presently uses trace-3D to
 simulate beam response. 

Stuart Henderson noted that diamod foil work at ORNL is progressing. These 
use a small grain size, and will be supported on 2 sides. It is not known is 
cross carbon fibers will stick well.

E. Tanke will go to LBNL and LANL to perform polarity checks on the quads.

J. Wei and J. Holmes will go to PSR next week to do more space charge 
experiments.

S. Danilov is using M. Blaskiewitz's RF code.

J. Wei noted that BNL will redo the extraction kicker test, to see the 
influence of the ferrite and to recheck the heating test.

Alexie and Nuria are in Russia doing collimation tests.

S. Henderson noted that the injection kicker power supply tests indicated 
that there is a lack of proper regulation below 15 A, and this will need to 
be fixed.