Accelerator Physics Video Conference Minutes, 01/08/2002

Participants:

BNL: M. Blaskiewicz, D. Davino, A. Fedotov, Y. Lee, D. Raparia, J. Wei

LANL: S. Nath, M. Plum, R. Shafer, H. Takeda, L. Young

LBNL: R. Gough, R. Keller, J. Staples

Jlab:

ORNL: S. Alexandrov, P. Chu, S. Cousineau, R. Cutler, S. Danilov, G. Dodson, M. Gianella, J. Galambos, S. Henderson, J. Holmes, D. Jeon, D. Olsen, T. Pelaia, A. Shishlo, M. White

Agenda - 01/08

--01/08 Video Conference Agenda

1) Front End Beam Scraping Report

--Linac Halo Mitigation

2) LEBT Chopper Simulation

A simulation was carried out in which the partially LEBT-chopped beam was deflected in the LEBT to give 50% transmission through the RFQ. If such a beam is not cleaned up completely in the MEBT, the resulting linac beam quality could be unacceptable.

3) DTL Power Supply Rating Reduction

Tracking studies show that 200 Amp DTL steering power supplies are sufficient. The yet to be awarded current contract for 300 Amp power supplies can be reissued for 200 Amp supplies.

--Tracking Results With Steerers

4) HEBT Momentum Collimator Study

--HEBT Momentum Collimator Discussion Study

r) Ring e- Catcher Backscatter

--Stripped Electron Absorber Backscattering

6) Upcoming ASAC Review

The end-to-end calculation needs to be carried out promptly. The calculation will take account of MEBT mismatch errors and the best measured LEBT output beam distribution. It is necessary to perform this calculation soon so that there is time to make improvements in the case that results are bad.

6) EPAC 2002 Abstracts

LBNL is submitting 1 paper to EPAC. The topic will be front end commissioning at LBNL and the presenter will be R. Keller.

LANL will submit 1 paper to EPAC. The topic will be ongoing linac work and the presenter will be S. Nath.