22AUG07 Gun System Update1 Rich Andrews

22AUG07 Gun System Update2 Gun System Coaxial coupler Gun Cavity Solenoid Magnet Compensator Magnet

22AUG07 Gun System Update3 Overall Status Coupler drawings: complete, assembly process reviewed in house, detailed questions developed, ready for approval Cavity drawings: nearly complete, assembly process to be reviewed 1:00 PM OFE Cu: The Hitachi order is due 21SEP07 Solenoid Magnets and Power Supplies: Sole Source Purchase Request has been submitted. Can expect a delivery 7 months ARO.

22AUG07 Gun System Update4 Gun Cavity DESY Cavity (note from Klaus; 16AUG07) –The first brazing of the cavity, i.e. the cooling channels of the inner iris is already done. –The company wants to start with the final turning of the cavity cells and they want to do all three parts in a row. –They need the design for the cathode area now! –If we don't release it now, the whole production needs to be delayed. –I think we have discussed enough. –All points are made. –It will be your cavity, so you just have to decide. –Please let me know how to proceed! Fermi Cavity –Plan to begin construction of the cavity in October Coupler/Waveguide Assembly –Should also be ready to begin construction in October –May need to procure some additional OFE Cu (but not the Hitachi Grade)

22AUG07 Gun System Update5 Existing Cathode Configuration Watchband Type Canted Coil Spring Type

22AUG07 Gun System Update6 Mockup of Cathode: Version 3 Mockup of Cavity Backplane Mockup of spring retainer plate Spring Cathode

22AUG07 Gun System Update7 Cathode Status Detailed plan for cathode configuration received from INFN 12JUL07 Later note from Carlo expressed the need to have details of the spring design and groove to proceed with productive discussions. Detailed information was sent to Bal Seal on 25JUL07, and required several exchanges to make sure they understood our needs. Bal Seal is proceeding with their 104 series spring in 316SS, gold plated, keeping the cathode diameter at 17 mm., and adjusting the groove to fit I am expecting this information from Bal Seal as early as today (after out last discussion yesterday) Once we have the groove data, we can complete Prototype 3 in the shop (by Friday if we have the groove data today) Bal Seal is also trying to get a spring for us (of any material but correct geometry) on a similar timescale It makes sense to me to complete this step before proceeding at DESY

22AUG07 Gun System Update8 Bal Seal Groove Design (submitted 22AUG07)

22AUG07 Gun System Update9 Other Gun System Elements Structural Support –We are only beginning to think about this –Plan to use Lucy Nobrega to develop this element –The scope of this task should be expanded to include support of both Gun and Cathode Systems –Should provide for ability to move both systems either together or independently –Will need to develop the interfacial supports between cathode boxes, solenoid magnets, gun cavity and coupler 10 Way Cross –Have asked Lucy to handle this as well –She will start by understanding the role of each port –I plan to discuss this with Klaus during next trip (drawings, procedures) Micromover –Little has been done with this to date –We have the general write-up describing the concept –Have a few photos from last trip –Plan to develop a contact and obtain drawings during next trip –Have discussed this a little with Klaus Dark Current Kicker –We have made a contact with Frascati, and they understand our desire to take a look at their design and obtain drawings of the kicker and especially the feedthru. Absorber –Initial studies only –Could look at the DESY design as well if it would be helpful?

22AUG07 Gun System Update10 Cathode System Preparing to ship 4 ion pumps, 2 dual channel power supplies and associated cables, along with the 5 VAT valves purchased last October I have received no status updates from INFN.

22AUG07 Gun System Update11 Laser Mirror in the Diagnostics Cross How is this piece made, installed and sealed? What about this seal?

22AUG07 Gun System Update12 10 Way Cross and Absorber at DESY

22AUG07 Gun System Update13 10 Way Cross and Absorber