MEMORANDUM
To: J. Albertine, D. Helms, W. Skinner
cc: Division (M7), FEL Coordination Group
From: F. Dylla
Subject: IRFEL Weekly Report Feb. 3-7, 1997
Date: February 7, 1997
Management
Preparations moved into high gear for the DOE-BES review of the
FEL project which will occur February 23-25. A briefing package
was prepared for the reviewers and DOE observers. Outlines and
rough drafts for the Jefferson Lab presentations were prepared.
Guidance was provided to the outside speakers who will be presenting
talks on FEL applications. All WBS managers were asked to review
cost and schedule performance and to prepare summaries for the
review.
Two talks to be presented at next week's SPIE Conference on high-power
lasers were prepared by G. Neil and M. Shinn. Two of our FEL
collaborators, M. Kelley and A. Todd, are also presenting papers
at the same conference on the respective topics of industrial
and defense applications of high power FELs.
A draft report from the meeting of MTAC on December 18 was received
from SURA. Comments were returned to SURA and the Navy HEL Office.
The committee urged the Jefferson Lab team and our industry collaborators
to work with the Navy Program Office to strengthen the long-range
plan for further discussions with Navy officials and congressional
staff.
A draft Field Work Proposal for FY98-99 support of the FEL project
by the DOE-BES program office was prepared for internal review
prior to submission to DOE in March.
Injector Test Stand
We have manufactured a good cathode. The SF6 tank was reinstalled
and charged. The existing ceramic stack was high voltage processed
to 320 kV. Beamline diagnostics and magnets were reassembled
and checked out. ITS control system was moved over to a new network
server. We have aligned the drive laser onto the new cathode,
therefore all systems are ready for startup of beam operations.
Regarding upgrading the photocathode gun:
Coating on Cathode Support Tube - FM Technologies reports the
tube will ship on Wednesday, February 12.
Ion Implanted Ceramics - Lawrence Berkeley Lab is in the third
day of implanting the first ceramic, and the second ceramic with
newly brazed, leak tight rings is in their hands. Contact difficulties
prevented uniformity test readings on the test ceramic. We were
unable to convert our supply of platinum to rod. The powder was
sent to Berkeley where their materials department will be able
to do it by Monday afternoon which is just in time for use implanting
the second ceramic. The mid-voltage ring is welded and is leak
tight.
Regarding other ITS activities:
The waveguides and HOM filters with their LCW are all assembled
and waiting for the installation of the warm windows on the quarter
cryomodule. The Chopper coupler, cables, and water skid were
installed again after the beam line was baked. The new cooling
fins for the Chopper's drive probe were attached and connected
to the water line.
The waveguide penetrations in the cave roof were plugged with
sand last week. RadCon has approved and will inspect when we
start beam operations.
Accelerator Systems
Regarding the beam-transport system:
The problems with interferences between the Optical Chicane dipoles
and shielding for the optics were resolved with some slight alteration
of the chicane dimensions by the machine optician and a change
in diameter and down beam shift of the optical cavity enclosure.
The design of the reverse-bend dipoles and the 180-degree dipoles
continued at Northrop Grumman.
Substantial portions of the vacuum hardware have been ordered
over the past few weeks.
A kick-off meeting was very productive for design of the stands
for magnetic elements downstream of the cryomodule.
Regarding controls and electron beam diagnostics:
Monday was spent at the beam viewer vendor machine shop for final
inspection of the 13 shielded beam viewers. These were assembled
and are being leak checked for shipping on February 7. The BPM
has passed all of the tests, the drawings have been updated, and
the requisition is being circulated for approvals. We are asking
for 60 days for fabrication.
Argonne is reviewing the price of the Machine Protection System
(MPS) hardware that we are procuring. Half of the boards are
complete and awaiting the cost numbers.
The Personnel Safety System drawings for installation and rack
layouts are complete and signed off.
FEL Systems
Wiggler
All elements for the wiggler support have been ordered. Design
work is at the 90% level and holding for the vacuum chamber.
This week's work has concentrated on the vacuum chamber support
which is at the 30% level. STI Optronics reports that they have
received most of the magnets from Shin-Etsu, and measurements
are ongoing. STI projects that final measurements of the wiggler
will be done by March 21.
Injector Reinstallation
Bids are due today (2/7) for the high voltage power supply tank.
The bid period for the laser clean room was delayed to allow
time for two more vendors to reply. Only one vendor had replied,
and that quotation was higher than the budgeted amount. Design
work is on schedule for the injector layout with about 30% of
the work completed.
Optics
Design efforts this week continued on investigating potential
interferences between the new optical chicane dipoles and the
optical cavity assemblies. The problem was resolved as noted
in the Beam Transport report given above. We also held a design
meeting on optical table stands supporting the optical cavity
assemblies. A follow-on meeting will be held next week. Several
subassemblies (i.e., bases and stands) for the optical cavity
are complete and are being inspected. A layout of the optical
transport system is being developed to assist the installation
team. The windows for the optical transport system mirrors were
ordered.
Facility
Structural steel was loaded onto the second level throughout the
week as preparations were made to assemble the framework. The
rebar was laid in and the loading dock poured. At the same time,
the pads were set for the HVAC compressors and the retaining walls
for the electrical main transformer. Heavy rains managed to flood
the injector and wiggler pits downstairs when power was accidentally
removed from sump pumps early in the week. Cleanup of the lower
level was begun so that cryogenic piping can be brought in and
welding initiated using a rental generator. Installation of the
warm gas lines in the tunnel is 80% complete.