AGENDA:

General Announcements

Action Items

Progress Toward the Milestones of the enclosed schedule:

NOTE: Meetings are held every Tuesday in CEBAF Center, Room #A110, at 11 a.m., unless otherwise notified.

ATTENDEES: M. Augustine, S. Benson, W. Bennett, G. Biallas, C. Bohn, L. Dillon-Townes, F. Dylla, D. Guilmet, K. Jordan, G. Krafft, D. Kehne, R. Legg, G. Neil, M. Shinn, C. Sinclair, J. Song, R. Walker, M. Wiseman

NOTE: A reminder to all principals to submit a brief weekly progress to D. Gilchrist each Friday by noon

General Announcements:

none

Decisions/Comments:

We will plan to put in the BPMs both button and strip line in order to test them and have something to assess energy stability but there is an alternative in the form of OTRs and frame grabber. The fast momentum stability will be received directly with a scope.

Safety Action Items:

K. Jordan - Add a third sensor for ODH to the High Voltage room. Almost done.

J. Fugitt, C. Reese, K. Jordan - Review the safety effects on our systems of running only one HPA for work in the Cryomodule Test Cave. In process but not needed until at beam is used in the cryomodule. No progress.

New Safety Action Items:

S. Benson needs a new list of the qualified laser operators. See the memo below:

Completed Safety Action Items:

Rich Hill - Label the gas lines with media and pressure - Complete.

G. Biallas - Provide safety hardware for the shelf by the LCW system. Not needed. Personnel will not go in that region except with a harness. Complete.

Action Items:

G. Biallas - Make a new ceramic stack and make a new cathode support tube with a anti field emission coating. See weekly report by G. Biallas.

Determine the need for additional personnel required to match or beat the Schedule. K. Jordan requires an additional person to keep up with the load. Requests are due to F. Dylla by Friday.

G. Biallas - Finish the LCW System: Flow & Temp reading, Level indicators, Full qualification walk through needed. Walk through complete. Several items need additional work.

K. Jordan/S. Benson - Failure analysis for the 10 MeV beam handling. Meeting held yesterday again. No show stoppers showing up.

R. Legg - Write the OSP for the 10 MeV Experiment. OSP for the 500 keV Experiment with chopper on and cryomodule in the cave ready for sign-off.

M. Shinn - Define a secure procedure for turning on the Drive Laser from the control computers. No progress but much i expected soon.

J. Preble - Get the ceramic windows finished for the December Quartercryomodule tests. One is on hand. Promised by January 15. No news.

K. Jordan - Design a new viewer system with stable cameras and appropriate windows. At the same time avoid stray light back to the Cathode. Being done during change-over. K. Jordan will follow up.

M. Shinn - Perfect the optical chopper before the next CW run. Complete except that photo refractive damage to EO1. Michelle is obtaining a Lithium Tantalite crystal that should be better.

G. Biallas - Get drawings prepared of the configuration of the gun for the control room and a summary package that can be sent to others as an explanation of what the gun is. No action.

L. Dillon-Townes - Get the core for the solenoid before the Quartercryomodule for the 10 MeV Run. Drawings need sign-off.

G. Biallas - Characterize the raster magnet for 10 MeV and measure several QJs that need alignment bushings. In process.

D. Kehne - See if spectrometer dipole for 10 meV needs a field clamp and saddle coils. In process.

New Action Items:

T. Siggins - Make a new Cesiator (perhaps of the new style)

Fred Dylla - Come to closure on the SRF schedule and the use of the VTA, Cryomodule Test Facility and the 1/4 Cryomodule - How should the available refrigeration be spread around?

All Principles - Assess the true cost of proceeding with two rounds of baking the gun for the 350 kV experiment and forecast the true schedule. Get comments back to D. Walker.

K. Jordan - Provide for alignment on the multi slit.

L. Dillon-Townes - Add the Differential Pump to the 10 MeV Line.

R. Legg - Verify the Fowler-Nordheim field emission current from the cathode support tube assuming a beta of 300.

New Action Items for the Diagnostic Mtg.:

None

Completed Action Items:

R. Walker/K. Jordan - Substitute stainless steel for the aluminum filament supports on the harps. Complete.

Individual Reports of 1/10/97:

G. Biallas:

The three parallel paths to allow the gun to achieve 350 kV (or even 500 kV) are converging to solutions at about the same time, the end of January.

Coated Cathode Support Tube - FM Technologies will be calibrating their apparatus with a short stub of polished tube we are sent them last Friday.

Ion Implanted Ceramics -L. Phillips and T. Siggins spent the week preparing the Rotisserie and performing an initial resistance reading at Lawrence Berkeley Lab and the last two days coating a "dummy" ceramic to a dose of 2.5x10^16 per cm. Measurements Friday night indicate ever so slight crossing of the threshold of the start of declining resistance. The rotary feedthrough leaked at this point. If the dummy implantation is successful, the improved ceramics will be coated over the next several weeks by the Lawrence Berkeley Group.

CR/V Oxide Coated Ceramics - We will make a decision on what to do with the ceramics after results from the dummy ceramic ion implantation are known.

R. Walker:

The waveguides to the Quarter cryomodule are waiting for the installation of the warm windows before they can be connected. The Chopper coupler, cables, and water skid were installed and tested this week.

A replacement valve for the Buncher water skid has been received and will be installed in the next few weeks. The M-460 CAMAC card needs to be repaired so the Buncher cavity water temperature can be read.

The new downloadable code and screens for the Buncher/Chopper code were tested this week. Several bugs remain in the code and will be corrected.

The Chopper cavity was tested to approximately 290 watts of RF power with the following results: a) the new drive probes were heating and will have to be water cooled; b) the software has several bugs and the HPA had to be operated in the Local mode; and c) the cavity probe signal was lower than expected by 5 dB.

User list from S. Benson

The following personnel are presently approved for operating the Antares laser in the Test Stand laser enclosure as of Jan. 7 1997.

Stephen Benson

Richard Dawes

Bruce Dunham

David Engwall

Wael Ibrahim

Kevin Jordan

David Kehne

Geoff Krafft

Robert Legg

George Neil

Michelle Shinn

Jinhu Song

Tim Siggins

Trey Thurman

Dawn Venhaus

Court Bohn, Walter Dail, Rich Evans, Rich Hill, Jack Ludwig, and Noel Okay should also be approved as soon as I am sure that they have been signed off on everything. The question is, does anyone need to be an approved laser user who is not already approved? Also, is there anyone who will no longer be doing any work in the enclosure who should be dropped from the list?

Enclosures:

ITS Schedule for 1/13/97