Accelerator Physics Meeting 1/11/00

Present: J. Wei, Sang ho Kim, Marc Doleans
D.O Jeon, Sarah Cousineau, J. Galambos,Paul Chu, Eugene Tanke,
Weishi Wan, S. Danilov, S. Aleksandrov, G. Dodson

G. Dodson noted that there will be a commissioning meeting at LANL
on Feb. 15. There should be a large attendance by the AP
group, as this meeting will be more physics oriented. J. Galambos,
D. Jeon, E. Tanke, and S. Aleksandrov will attend. 

Ji.e Wei will attend a meeting at LBNL next week and visit B. Sieman 
with J. Stovall afterwards.

There was a discussion on the video conference. Sang-ho showed results
indicating very good agreement between Marc's model (which integrates
through the Superfish output generated fields of the asymetric cavities on 
a very small step size) and parmila. The differnce with Ron's model was 
identified as a differnece in Superfish field levels, due to a mesh size
refinement. There was a mention that it would be useful to 
benchmark the linac codes with machine data as well as with each other.
We need to check on how parmila is including the effect of the 
radial electric field to compare with Marc's model. 


Sahsha's note on the Ti coating  of the ferrite kicker was well accepted
and being proposed for adopttion in a new PCR. 

Slava showed some recent transverse instability calculations indicating
large halo growth even in the presence of modest centroid movement.

Sasha showed MEBT commissioning techniques to set quad levels based
on matching predicted profile shapes. While it is possible to get the
quads levels set to closely match the beam profile shape, there can still
be large mismatch levels present.

Sarah is reducing the data from the IUCF experiments. 

Paul is experimenting with the SDDS toolkit, for possible use in the 
application programming  environemnet.


Jeff is returning to the lattice studies.

Eugene has used trace-3d to study the effect of weaked PMQ's in the linac.
Uniform reduction of all quads levels by up to 20% is not too harmful.

Weishi has included the last part of the global coordinate system (the
injection dump).