From: Vlieks, Arnold E. Sent: Monday, April 18, 2011 12:17 PM To: Anderson, Scott D. Subject: RE: RF Gun Magnet. Hi Scott, Sorry for the delay. We had some issues with the magnet, which have been fixed. I’ve asked John Eichner to bring the magnet to the welding shop to have the tuning ball sockets welded on. The magnet will then be brought to you. Your list of past measurements are what I would like. Basically, after item 6, find the magnetic center and repeat the transverse measurements at this location. I don’t quite understand items 9-12., unless the magnetic center moved. I would like items 10 and 11 done referenced to the magnetic center. The charge number is 7209104. Best regards, Arnold From: Anderson, Scott D. Sent: Monday, April 11, 2011 1:54 PM To: Vlieks, Arnold E. Cc: Gassner, Georg L.; Houck, Timothy L.; Juarez, Luis E. Subject: RE: RF Gun Magnet. Arnold, The alignment group can suggest the best locations for the tooling balls, but your group or MFD will need to weld the tooling ball on the magnet and that needs to happen before the magnet is brought into our area. You should contact Georg Gassner about arranging alignment services for determining the best locations of the tooling balls. I have a few questions and statements about the measurements. Item 3: Monitor temperature and water flow. Temperature measurements can be done, though you need to specify the current(s) you want this done at and what temperatures to measure. The other solenoid was measured at 150, 200 and 300 amps, each for 1 hour, with the resistance, current, input water temp, output water temp and inside bore temp being monitored. Item 4: Z = 0 will be the outside surface of the upstream end plate. Item 5: Transverse fields along axis in .5 cm steps at 200 A. Which axis, mechanical or magnetic? Typically it is measured along the magnetic, with the magnetic axis being given as some number of mils from the geometric axis. Last time we did both axes. You can review the measurements we took for the other solenoid at: http://www-group.slac.stanford.edu/met/MagMeas/MAGDATA/X- Band_Injector/Solenoid/Compton_101_2nd/ A list of the measurements is: 1 Axial field vs Z in 0.005 m steps. Z = 0 is upstream end plate face. Current s are 150, 200, 250 and 300 A. Flow is 3.875 gpm 2 Resistance and temp measurements at 150, 200 and 300 amps, each for 1 hour. Flow = 3.875 gpm. Delta pressure = 104 PSI. 3 Axial field vs Z in 0.0005 m steps around negative peak (z=0.0622 4 Axial field vs Z in 0.0005 m steps around zero point (z=0.1252). . 5 Axial field vs Z in 0.0005 m steps around positive peak (z=0.1902). 6 Transverse dipole fields vs z at mechanical center, magnet current = 200 A. 7 Transverse dipole fields vs z at magnet center (X = +5 mils, Y = +5 mils), magnet current = 200 A. 8 Transverse dipole fields vs z at magnet center (X = +5 mils, Y = +5 mils), magnet is off. 9 Transverse dipole fields vs z at magnet center (X = +7 mils, Y = +7 mils), magnet current = 200 A. 10 Multipoles using 1 inch coil. I = 200 amps. (X = +7 mils, Y = +7 mils). 11 Multipoles using 1 inch coil. I = 300 amps. Step size = 0.5 inches. (X = +7 mils, Y = +7 mils). You could tell me which ones you would like to do for this magnet. Finally, we need an account # for this work. -Scott Anderson SLAC National Accelerator Laboratory Magnetic Measurements (650) 926-4590 sda@slac.stanford.edu From: Vlieks, Arnold E. Sent: Monday, April 11, 2011 10:37 AM To: Anderson, Scott D. Cc: Haase, Andrew Subject: RF Gun Magnet. Hi Scott, The RF gun magnet is being scheduled for delivery not later than Wednesday. The tooling ball holders are not welded on the magnet but will accompany the magnet. I assume the alignment crew will install them in the most useful location for them. I’m sending you a description of the measurements I believe are the most useful. If you see errors please let me know. Best regards, Arnold