February 28, 1997
From: Fred Dylla
To: Accelerator Div. Dept. Heads, Deputy Dept. Heads, Group Leaders and FEL Dept
Subject: Plan for Injector Test Stand
Presently the photocathode gun is on the critical path for the
IRFEL. Accordingly, the Accelerator Division Leadership Group
has decided to defer all commissioning and beam operations of
the 10 MeV injector for the IRFEL from the ITS to the FEL
Facility. This schedule change was approved by our Navy Program
Officer. The decision is motivated by Jefferson Laboratory's commitment
to meet the Navy's contractual milestone to have the IRFEL hardware
in place in the FEL Facility by 30 September 1997. The revised
schedule will allow maximum ITS runtime for gun testing prior
to moving the hardware to the FEL Facility. A reliable gun will
provide the foundation for efficiently commissioning the installed
machine, and the extra time will make it more likely that a reliable
gun will be on hand. Plus, the decision ensures we can use installation
resources when they are available, i.e., during the summer.
The Injector Test Stand Program is now a photocathode-gun-development
program which, in regard to the IRFEL, will end on 1 June 1997.
At that time, the gun and other injector hardware will be moved
to the FEL Facility for reinstallation there. In addition to gun
operations, there will be extensive off-line testing of the cryounit
for the injector in the ITS prior to 1 June.
The top-level schedule for the ITS is as follows:
|250-300 kV gun transverse/longitudinal experiments||Feb-Mar 97||ITS|
|Cryounit tests without beam||Mar-Apr 97||ITS|
|350+ kV gun reconfiguration/operation||Apr-May 97||ITS|
|Injector reinstallation (gun, buncher, cryounit)||Jun-Aug 97||FEL Facility|
|Begin injector commissioning||Oct 97||FEL Facility|
I sincerely appreciate all the support that Accelerator Division
has been giving the ITS and IRFEL projects. Because of this, I
believe we will succeed with the IR FEL milestones.