Next Meeting (note that it is "formally scheduled")
Agenda for Next Meeting
Item Principal Time ---- ------------ -------- Status of Open Action Items All 5 min Status of Installation/Maintenance Walker 15 min Status of HVPS Modifications Fugitt 5 min Status of IR Detector "Modifications" Merminga 10 min Boundary Conditions for Laser Optimization Benson 15 min New Issues All 5 min
This Week's Attendees
J. Bennett, S. Benson, G. Biallas, C. Bohn, J. Boyce, D. Douglas, F. Dylla, R. Evans, J. Fugitt, A. Grippo, J. Gubeli, R. Hill, K. Jordan, L. Merminga, G. Neil, D. Oepts, M. Shinn, T. Siggins, R. Walker
Closed Action Items
New Action Items
Old Action Items
Items of Discussion
F. Dylla updated the attendees on the latest FEL-related "marketing" activities, of which there are several. It seems difficult to imagine that none of them will come to fruition. Rather, the fundamental uncertainty seems to be "when" a funding source will surface, not "if" it will surface. Regardless, all of the marketing activities would be strengthened by our achieving higher laser power, and so we continue to focus on providing kW-level operation.
Accordingly, C. Bohn presented the strategy and plans for commissioning to kW-level power after turn-on -- the same material he presented at last month's Accelerator Division Review of FEL Commissioning. The talk generated much interesting and useful discussion. Topics that need further discussion off-line include how far, in principle, one can push the optimization of the laser itself (a topic to be revisited at next week's meeting, per the agenda above) and how to modify the electronics of Happek #1 to see a signal from it. The potential benefit of upgrading the gun's high-voltage power supply to support 5 mA current was also discussed, with the result that J. Fugitt will attempt to do the upgrade during this month's down time. Based on the gun schedule, resumption of commissioning with electron beam is projected for 25 Jan 99.
Bohn also indicated his desire to preposition an "Injector Setup Team" to be activated if and when a beam-transport limit is reached that is potentially traceable to the injector. The proposed (repeat -- proposed) team members are G. Biallas (team leader and Injector Owner), G. Krafft, L. Merminga, P. Piot, T. Siggins, and B. Yunn. Bohn's desire is to plan well enough during this month's down so that the injector setup activities could be completely done in a week's worth of shifts. Shift staffing would be: Piot/Yunn on Owls, Biallas/Merminga on Days, and Krafft/Siggins on Swings. Biallas is already working on getting the related test plans and procedures together based on the last few month's experience. Some are done already, and others are in preparation.
D. Douglas summarized his observations from our last run by stating that the focus upon turn-on needs to be setting up the 5F (reinjection) region more carefully, especially the steering. The process would probably be facilitated by the addition of a viewer in this (already crowded) region so we can certify that the steering through the second arc is properly established. [Note: In a follow-on meeting, K. Jordan indicated that the installed 3-way cross can be modified into a 4-way cross, and the old ITS viewer can be inserted into one of the ports. He has already arranged to have the work done -- Thanks, Kevin!]
L. Merminga reported that there is ongoing discussion in the Test Lab about the IR waveguide detectors in the cryomodule. Plans are to warm up the cryomodule this month and install screens over the IR-detector ports to screen out HOM-induced rf radiation to which they are sensitive. A possibility under consideration is to leave one of the detectors unscreened and use it as an HOM diagnostic, with its trip point essentially circumvented.
G. Neil reminded us of the need to certify people on the operation of the Optical Control Room (OCR) so we can implement the new Safety and Operations Envelope and lase into the OCR dump without the need to have an FEL-cognizant person in the FEL Facility. Bohn followed by asking those who have had ARM training but have not yet done the practical exercises with K. Welch to complete their certification process. He also asked R. Walker to finish SSO training, and he asked for a second volunteer for SSO, so the FEL will have a total of four SSOs available. By doing so, we should be able to run during at least part of the main-machine downtime scheduled for 2-30 Jun 99.
New Issues
Covered in discussion above.