Minutes of the IR FEL Beam Transport Meeting, November 21, 1996

Next Meeting: Thursday December 5, in Room 84, Trailer City at 1:30 P.M.

ATTENDEES: S. Benson, C. Bohn, D. Douglas, E. Feldl, K. Jordan, J. Karn, W. Merz, M. Wiseman

Schedule Comments, Decisions and other Comments:

Action Items:

G. Biallas - Get the BT contracts signed. Contracts needed to be changed to new DIMAD configuration. No progress.

L. Dillon-Townes - Respond to recommendations of the Vacuum review. In process.

D. Douglas - With D. Kehne, resolve beam spot sizes at energy-recovery dump. In process.

G. Biallas - Get recirculation dipoles designed by Northrop Grumman's V. Christina per the schedule. G. Biallas at NG today.

J. Karn - Investigate the sensitivity K and integrated magnet length with respect to changes in field clamps. Complete.

G. Biallas/K. Jordan - have cable tray layout complete by Oct. 21. Cable tray meeting held and layout progressing. B. Shinault to order tray. G. Neil will take over coordination.

G. Biallas - Publish with W. Merz, the projected voltage and current on all magnets and define the hysteresis cycle. Injection/extraction dipoles need definition.

G. Biallas - Hold the Design Review on Monday, Nov. 18. Partial review held. Dipoles actual properties match to specs needs more work.

D. Douglas - Re do the lattice with the new K value, take into account the request to obtain a recirculation length of 498.5 cycles in order to allow prototyping of multipass monitoring (stretches the circumference by 1.6 m.) and add 6 inches to the space between cryomodule and recirculation dump dipole and reinjection matching that is compatible with upgrade. Being worked.

G. Biallas - Reestablish the basis for gaps on all dipoles. In process.

D. Kehne - contact Robin Wines to get and evaluate beam spot sizes in the Recirculation Dump.

E. Feldl - Get the windows on order for the 180 Degree Bends. In process with the necessary mirrors.

K. Jordan/E. Feldl - Evaluate the use of ports straight ahead at the Optical chicane dipoles to extract straight ahead OTR light and act as a synchrotron light monitor. No action.

L. Dillon-Townes - Order the entire stock of required vacuum hardware (including bolts and gaskets) In Process.

M. Wiseman - Order the right quantity of adjustment cartridges now that the stands are defined. In process.

New Action Items :

M. Wiseman/Design of X Chamber that is straightforward to build by last week in November.

LaDT - Resolve differential pumping issue.

C. Murray - Finalize injection line dump on machine drawing.

D. Douglas - Set up meeting to finalize optics of injection line which will include B. Yunn's analysis of beam dynamics.

D. Douglas/K. Bohn - Get Division agreement on frozen lattice.

Completed Action Items :

J. Karn - Make the prototype Trim Quad by Oct. 16. Complete.

S. Benson reports that the cable tray near the optical cavity needs to jog only slightly because the telescope will not be near the ceiling as originally planned. This needs to get to R. Wolfly's layout. Complete.

S. Benson reports that the duct in the upper corner of the ceiling on the south wall jogs the optical lines away from their intended position. This needs to get to R. Wolfly's layout. Complete.

S. Benson - Investigate the effects on the Insertable Dumps of the new mode at 15 micro A, CW proposed by J. Kraft. Insertable dumps need shielding and interlocks. Complete.

S. Benson - Evaluate the need for windows through out the machine at the Brewster angle. E. Feldl getting ready to order 20 windows in crystalline quartz. S. Benson notes that Sapphire windows at a 20 % greater price are far preferable to fused quarts windows. Not needed, normal incidence is OK. Complete.

C. Murray/M. Wiseman - Define the new positions of lights in the FEL building that will not interfere with cable tray and optical lines. Complete, given to the architects through G. Neil.

C. Murray - Transmit to C. Curtis the position of the High Voltage Power Supply for the gun. Complete.

L. Dillon-Townes - Provide B. Yunn the configurations of the simplified beam tubes. Complete.

New Action Items for the Vacuum Meeting:

None

Summary of Vacuum Meeting Review:

No Meeting this week

New Action Items from the Diagnostics/Commissioning Meeting:

None

Web Items:

C. Bohn - Get bunch lengths to the Web. A hot button needs to be established.