Power Supply System Impacts

1
Power Supply System Impacts

• WBS 1.1.3 Power Supply System
• Level 3 Manager
• Nancy Grossman
• FNAL
• Dec 11, 2001

2
Update of PS Needs

• V109 has one more 6-3-120 (now 4 instead of 3)
  and runs at a higher current (1050 amps)
• Requires another 500 KW supply to get the needed
  volts.
• Have space for 1 more 500 KW in TSB.
• Only remaining 500 KW PS are old Transrexs, we
  are checking on getting an additional one (or
  other options, and checking the ramp).
• V110 has one less EPB (now 5 instead of 6) and
  runs at a higher current (1400 amps)
• Does not require an PS changes, will need to
  re-calculate the ramp.
• Q109 is now two different quads (3Q120, 3Q60)
  which can run on one supply.
• Two possible 3Q120s (quads) in the carrier
  tunnel (unlined region)
• Will need an additional PS each (there is room
  for them and we have spares)
• Cable lengths and costs all need to be
  re-estimated.

3
Update of Regulation Needs

• Magnet Strings regulation requirements are looser
  with the new beam optics.
• Could use less regulation than we have budgeted
  for, if this remains true.
• Not clear if loosening the regulation is worth
  the money saved.
• Dont need to decide until FY2003.
• Costed filters for all 7 strings, and BmLB
  systems for 3 strings, HOLEC transductors and
  special FNAL electronics for all 7 strings.

4
Summary

• All these comments are very preliminary and
  Steve Hays will check in detail to see what are
  the final implications.
• Main Changes
• Need extra 500 KW for V109.
• Need 2 more quad PS if put quads in carrier
  tunnel.
• PS regulation requirements are looser.
• Cable lengths and numbers.
• (need to re-do ramp calculations and cable
  calculations/costs)
• Implications
• Can we get additional cable (500 kcm) or is it
  too late? Not sure if we will need it or not
• Additional costs are for 500 KW PS and quads and
  cables. Estimate several tens of thousands of
  dollars (FY98).
• Might be able to save money on PS regulation, but
  we would need to think long and hard before doing
  that.