BSM23W Electronic Log Entry 08 March 2006

March 2006

March 8, 2006 Attempt to Realign e- Synchrotron Light Monitor Optics (MAP/EPT/RME/RNC/LMW)

• 10:40 Initially get light going through center hole in H periscope change with pretzel on
  • Do NOT get light to reticle
  • Optimize so that we are not at an aperture edge with no effect
• 11:10 Start access and will trace optics path start to finish
  • Forced to ramp in order to get e- injection. Injection after ramp required lowering horz tune by ~200 CU
  • Target at V periscope input:
    • Setup to view V periscope entrance (#1):
      
    • Setup to view V periscope entrance (#2):
      
  • Observe synch light spot approx. 1/8" North and 3/16" low entering periscope:
    
  • Verify that burn strip is present
    
  • VB23 scan (seps on)
    • -1000 CU :
      
    • 0 CU :
      
      
      
    • 1000 CU :
      
      
      
    • 500 CU :
      
      
      
    • 230 CU :
      
      
      
    • 0 CU :
      
      
      
  • Check pretzel effect
    • Horizontal Separators ON:
      
    • Horizontal Separators OFF - observe a 1/16" shift to the north:
      
      
      
• 12:30 Setup for tracing path through vertical periscope
  • Light entrance point on periscope means that a "true" vertical path will be displace towards the aisle and northwards in vertical periscope. Note that the mirrors area actually offset towards the south of the vertical periscope centerline so this is not an ideal alignment. We should consider moving the vertical periscope another 1/8" (beam offset) + 1/4" (nom. mirror offset) = 3/8" to the north!
  • Set up a pair of flags (top with hole near nominal true vertical path, bottom without hole) to try to optimize upper mirror.
    • Vertical Periscope Internal Setup:
      
      
      
    • Vertical Periscope Setup on Monitor:
      
      
      
  • Thread hole by adjusting CSRSYLTOUCHY 1 and 2
    • CSRSYLTOUCHY 1: Old = 511 --> New = 267
    • CSRSYLTOUCHY 2: Old = 539 --> New = 569
  • Take pictures with/without lights on.
    • Vertical Periscope with Synch Light (no tunnel lights):
      
      
      
    • Vertical Periscope with Synch Light (with tunnel lights):
      
      
      
• 13:10 Turn over to MJF
• 15:20 Set up to look at image on bottom mirror of vert periscope
  • Place target over mirror (picture)
    • V periscope bottom mirror target setup:
      
      
      
  • Set up camera looking through 1st horizontal periscope mirror
    • Camera setup to view bottom mirror of V periscope:
      
      
      
  • Move CSRSYLTOUCHY 1 to 460 (from 267) to catch edge of bottom mirror in the horizontal
  • The alignment is pretty good in aisle-wall direction, but is too far North!!
  • This strongly implies we should proceed with the vertical periscope move towards the north!!
• 16:05 Start move of vertical periscope
  • Shift vertical periscope approx. 3/8" to North
  • Re-check position at input to periscope
    • Synch light spot at V periscope input after move:
      
      
      
    • Vertical position approx. 1/4" low
    • Long position approx. 1/8" to South. This is the correct direction to be offset slightly given the internal offsets of the mirrors in the vertical periscope (will maximize mirror aperture).
• 17:15 Start setting up vertical periscope through measurement
  • Will aim for center of lower mirror
    • V periscope bottom mirror target and camera setup:
      
      
      
    • Camera set up to view periscope middle target:
      
      
      
    • Synch light spot in middle of V periscope after move:
      
      
      
    • Synch light spot on bottom mirror target in V periscope:
      
      
      
    • Estimated spot position to center synch light on bottom mirror of V periscope:
      
      
      
  • Estimate this is at:
    • CSRSYLTOUCHY 1 = 477
    • CSRSYLTOUCHY 2 = 537
  • Above values based on scanning
• 18:30 Verify settings
  • CSRSYLTOUCHY 1 = 537
  • CSRSYLTOUCHY 2 = 523
• 18:40 Move flag to first horizontal periscope mirror
  • Centered North-South - slightly high which is OK given path through vertical periscope
    • Spot position on first mirror of H periscope:
      
      
      
  • CSRSYLTOUCHY 1 = 541
  • CSRSYLTOUCHY 2 = 524
  • CSRSYLTE CON 1 = 404
  • CSRSYLTE CON 2 = 661
• 19:00 Move flag to second horizontal periscope mirror and re-mount camera
  • Camera setup to view 2nd H periscope mirror:
    
    
    
  • Get reasonably centered (north-south) and slightly high image on 2nd flag
    • CSRSYLTE CON 1 = 540
    • CSRSYLTE CON 2 = 709
• 19:25 Set up flag on parabolic mirror
  • Setup to check spot on parabolic mirror (#1):
    
    
    
• 20:00 Start looking for beam
  • View of target in front of parabolic mirror:
    
    
    
  • Synch light on parabolic mirror target (#1):
    
    
    
  • Synch light on parabolic mirror target (#2):
    
    
    
  • Starting at last CSRSYLTE CON values and adjusting ONLY CSRSYLTE CON mirror
  • Find that we are fairly well centered in the slits vertically
  • Find that we are fairly well centered in the slits horizontally
• 20:xx Go down to place target in front of lens
  • Setup to view target in front of lens:
    
    
    
• 20:50 Start checkout at lens
  • View of synch light on target in front of lens:
    
    
    
  • Find that we are 1/16" low and 3/16 to left of center. Note that the aperture is +/- 3/16 horizontally.
  • We appear to be within 1/16" of proper vertical location
• 21:00 Go to tunnel to remove hardware and make single last mirror adjustment before handing over to JTH
  • Put laser into horizontal periscope and adjust until near center of target on lens
  • Adjust horizontal angle of flat mirror to move laser spot 3/16" on lens target
  • Exit
• 21:30 Have light on reticle and CCD after adjustments to CSRSYLTE CON 1 and 2.
  • Settings:
    • CSRSYLTOUCHY 1 = 541
    • CSRSYLTOUCHY 2 = 524
    • CSRSYLTE CON 1 = 567
    • CSRSYLTE CON 2 = 747
  • Turn over to JTH