The wiggler for the 10 kW Upgrade was installed on its mounting bolts in the final position in the FEL vault this week. There was also considerable progress made in the installation of stands for magnets in the recirculation arcs and with the support stands for the second and third linac cryomodules.

A critical final test run for ion implantation of the Upgrade gun cathode support tube was successfully completed this week. At week's end the first of six runs to implant the actual support tube was also successfully completed.

The FEL project management team (Dylla and Neil) attended a meeting of the FEL technical Working Group (FEL-TAWG) on Wednesday May 22 sponsored by the DoD Joint Technology Office. The TAWG is being re-constituted under a new chair Michael Dietchman, from ONR , who is taking over after the retirement of Eli Zimet in January. Many of the FEL experts that have been serving on the FEL Advisory Committee for the FEL Upgrade project have been invited to be members of the TAWG. The purpose of this working group is to advise the JTO on FEL R&D.

On Thursday, May 23 we attended a workshop in Washington on directed energy activities sponsored by the Directed Energy Professional Society (DEPS). The Navy's interest and ownership of the FEL development was presented by RADM Mathis and Cmd. Roger McGinnis of NAVSEA. The JLab FEL program was given good press at this meeting by both the above speakers and by the secretary of last year's Defense Science Board panel on high energy laser development.

DOE approved the JLab CRADA with Advanced Energy Systems for the development of a high current injector (100 mA) to support the 100 kW Upgrade program.

F. Dylla presented a talk on applications of the JLab FEL to surface analysis and surface processing to the AVS sponsored Topical Conference on Surface Analysis held on May 21-23 at Vanderbilt University.

Continued to work with W&M on the ion implantation system for the gun electrodes. Three implantation runs performed on a fourth test tube were completed successfully, meaning that the problems of arcing and implanted coating peeling off have been resolved. The actual support tube was mounted yesterday and the first of six runs has been completed successfully. Continued polishing the ball cathode which will be implanted next. Worked on the designs for the SF6 tank modifications and the HV resistor.

Gun HVPS - The 1st conditioning resistor for the Gun HVPS was sprayed and is drying. The 2nd and 3rd will be sprayed the next 2 weeks after which all 3 will be fired and tested. The tank for the HVPS is now due 6/6/02.

Quarter HVPS - Completed low level wiring of unit 3 and started testing Heater Voltage circuits. Heater Voltage board for unit 4 is finished, but not yet installed. The PLC code is not expected until 3rd week of June.

Quarter Klystrons - The parts are finished for the 2nd klystron cart, but they are not yet completely assembled. The parts for the 3^rd klystron cart are in progress. Both are expected to be assembled within 2 weeks.

Work continued on fabricating additional OMS chassis'. The lens mirror covers for the beamviewers were painted and ready for installation onto the frames. Progress was made on the cable pull for the Ion Pumps. The new smoke detectors were interlocked into the LSS. The PLCs for the MPS, CAMAC crate and modules for the BLMs have been removed from the racks along with a clean up of the cables.

FL06B01 (in the drive laser clean room) has been upgraded to include a VME crate running a new ioc (iocfel10) for the new drive laser pulse control system. This effort included a reorganization of existing hardware and a re-working of the cabling in the rack. Work continues on the Inventory Control System and significant improvements have been posted to the server. The first attempt at a check print for the BLM vme card (F0151) is being reviewed and appended.

The wiggler was installed onto its stands this week and is now ready for alignment and diagnostic installation.

Detailing the drawings for the optical cavity vacuum vessels has been somewhat more time-consuming than originally projected, so the plan is to release preliminary drawings to the fabrication scheduling team next week, and final drawings the week after. We met and discussed the request for fabrication advice by the vendor of the optical cavity internals. We determined that the SOW contains sufficient guidance, and signed off on the vendor's plan to machine both sides of all plates.

We held a planning meeting to work out the assembly and test plan for these parts. A separate meeting was held with the fabrication scheduler to have him determine that all fasteners, etc, will be available to us when parts begin appearing in several weeks.

At the time of this writing we are awaiting word on the delivery of one OCMMS assembly. The other OCMMS assembly continues to be delayed because of late delivery of the calcium fluoride vacuum viewports. We received the external OCMMS mirrors from the vendor 3 wks early. They will be inspected and measured to see that they meet specs.

Fabrication the first article 50kW optical beam dump is complete, except for brazing. This will be done within the next two weeks. The second "foam metal" (a metal mesh) design is also complete, but requires the metal mesh before it can be brazed. Vendors to create the absorber on the copper were identified and will be contacted to get pricing and delivery.

Our additional laser beam profiler arrived and was installed. We met with the software engineers to iterate plans for getting the new IR beam profiler output into EPICS.

We were informed by the vendor of the ultrafast laser oscillator that it will not ship before today. Safety goggles and glasses for this laser system were received. Assuming the safety audit proceeds on schedule, we are on track to have it installed the week of June 3.

The THz radiation monitor mechanical design was reviewed with respect to minimizing wakefields. Solutions were proposed (adding a trapdoor) and this is being incorporated into the design.

We are looking at ways to induce chirp on the electron beam (and thus the FEL output) in such a way that the electron beam can still be energy recovered. This will be needed when we wish to compress the pulsewidth of the FEL.