All effort was spent this week in trying to resolve a severe cash flow crunch that has developed because of a significant curtailment of support from the State of Virginia, and, as of yet, non-receipt of JTO, AF, and most Navy funds for FY03.
We have submitted documentation to the Navy showing details of our technical status, plans and schedule for completion of the commissioning, and labor loading projected through FY03.
Nimel Theodore and Carlos Hernandez presented papers at the 49th AVS Symposium in Denver on our ion implantation process used for preparing the gun electrodes. Nimel's contribution won second place in the student competition.
WBS 4 (Injector):
Assembly of the ceramic stack and electrodes was completed. The stack was moved to the FEL vault and installed onto the gun chamber. A leak was found where the door operating bellows welds to its terminating block. An in-place repair of the weld was attempted and failed. The flange assembly with the bellows will be removed and the repair attempted again.
Gun HVPS - The leak in the high voltage connector was repaired. The HVPS tank is being pressurized again to check for any additional leaks. Several mounting holes on the conditioning resistor mechanism were moved to allow assembly. Final mechanical adjustments are underway.
WBS 6 (RF):
Quarter HVPS - Making good progress with unit 4 with the addition of 2 technicians from the EES group. Planning to connect to 480 VAC late next week and start checkout. The klystron cart for unit 4 is to be ready next week also.
Buncher - The Buncher was warmed up without RF and the water loop operated. All water fittings have been removed in preparation for the Gun and beam line bake. One fitting interfered with the mounting bracket and had to be cut off. A different style fitting is on order that will not interfere.
Zone 2 - SRF testing is complete with this zone. It operates at its old Drive High values. The new cavity tuning offset values are within +/- 5° of the old ones.
Zone 4 - SRF commissioning is making good progress. Nearly all cavities have been operated up to 10 MV/m. The klystron cathode voltage was set too low (10.8 kV) and is being raised (11.6 kV) to allow the required RF power. This was done, but several problems developed and are being addressed now.
WBS 8 (Instrumentation):
Trim magnet software and associated controls screens have been completed for the 1F to 3F region. Epics communications for the 66 kW PS has been checked out successfully. The PSS certification for the remaining large DC power supplies was completed. DC power has been connected to the Wiggler and will be checked out during the lock up 11/8/02. The new 5000 gallon bag for storage of sulfur hexafloride gas has been installed replacing the 2500 gallon bag used for the old gun HVPS. Testing continues for the HVPS interlock/controller chassis. This will be installed next week. The beam diagnostics for the 2G spectrometer line are being finalized. A holder for the Si wafer (2G view screen) is being finalized with the shop. A design for synchrotron light monitor attenuators is also being done with the shop. We are building from stock Al parts rather than using a previous design that required extensive machining.
The diagnostics for the 2G spectrometer line are being assembled. The design to hold a Si wafer (view screen) is being finalized with the shop. Work progressed on the Wiggler viewers with fabrication, assembly and installation of the BV Interface boxes air will be connected early next week and the alignment will begin.
Drive Laser Pulse Controller (DLPC) - The VME version of the ConOptics
Model 305 is built. It picture of can be seen here:
http://laser.jlab.org/systems/wbs08_Instrumentation/drivelaser/dlpc/pcb-6uCO305/2002-11-08-pcb-6UCO305A-1.jpg. This plug-in module will provide the function that the Model 305 chassis does and will be fully integrated into the ioc (iocfel10). A link to a photo of the Model 305 chassis is here: http://laser.jlab.org/systems/wbs08_Instrumentation/drivelaser/chassis-CO305/ConOptics_Model-305.jpg. We are waiting on some rare RF connectors(SSMC, ~3 weeks) to finish the job. The Model 305 is currently operational and will stay online until the new system is up and running.
Drive Laser Controls - Bringing all the functions of the acromag card online continues. This multifunction I/O card does three functions, namely: discrete input and output (working), DAC control (working) & ADC input (in progress). Additionally, work continues on the RF/picomotor controller board. Parts are on order and the CAD work in in progress.
Identifying location and terminations of the signal and HV cables for
the BLM system has begun in the 0F to 3F region. System prints were submitted
to EECAD for the magnet communication upgrade as well as the new magnet
configuration in the FEL. We continue to work with EECAD to clear up the
backlogged drawings in their queue.
WBS 9 (Transport):
Optical Chicane Dipoles (GW)
WBS 10 (Wiggler):
Ran the wiggler with its power supplies. Power supplies, PSS, etc., all worked great.
WBS 11 (Optics):
Note: The attached photos show Chris Behre and Joe Gubeli installing the foundation plate into the vacuum vessel, and then, the next day, Chris Behre and Mike Bevins installing the bulk of the optical cavity internals in the vacuum vessel.
Our efforts this week were devoted to activities that will result in the optical cavity hardware, especially the vacuum vessels, being moved into the FEL vault next week. The "top hat" for the output coupler vacuum vessel passed its leak checked. Alignment of the internal components for the high reflector is nearly complete. This afternoon we will couple it's completed top hat to the lower vessel and leak check it while we begin installing the hardware inside the output coupler vessel.
Other activities accomplished this week are:
See individual activities by WBS, especially the rf operation of the cryomodules.