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Beampipe Volumes inside Support Tube

Since July 98, a lot of work has been done to update the beampipe volumes, including updating the masks in great detail, adding ion pumps, octagonal Q1 chambers, flanges and bellows. The mother volume containing all these is "BPMO". The followings are the details of volumes being updated and newly created.

"PIPE": berillium beampipe and flanges and bellows.

Plot
Update parameters: radius and half length
Changes in bpip.db: structure bmpipe

B1 Chambers

Changes in bpip.db: structure bpip and structure SRmask
  • HEB chamber (MSK2): update inner shapes, make elliptical mask, tungsten tip, and water channels. Plot
  • LEB chamber (MSK1): update inner shapes, make water channels.Plot

B1 magnets (B1MO)

Plot including ion pumps and bell housing
Changes in bpip.db: structure B1mag
  • Update mother volume (Al shell)
  • Make 2nd slice of magnets to be Pb
  • Make the shell outside of the last slice of magnets to be copper. (NOTE: This should be replaces by brass once the mixture is done.)

Ion pump and bell-housing

Changes in bpip.db: structure ionpm (NEW!)
Including:
  • Lead shield outside of the bell-housing
  • Most of the dimensions are by GUESSING!
  • Medium inside of the pump has to be decided later.

Q1 magnets (Q1MO)

Plot
Changes in bpip.db: structure Q1mag
  • Update mother volume (Al shell)
  • Update magnets (Q1A quad and dipole), add Q1B and Q1C
  • Add trims (copper tube outside magnets) which probably should be replaced by some mixture.
  • Add a steel shell outside Q1C

Q1 circular chamber

Upstream plot Downstream plot Changes in bpip.db: template bpvolu, structure q1msk (NEW)
  • One moon-shape mask (Q1D1) and a flat mask (Q1D2) in -z Q1 chamber
  • One moon-shape mask (Q1U1) in +z Q1chamber
  • All materials are copper

Q1 octagonal chambers (inside QOCT)

Plot
Changes in bpip.db: structure q1oct (NEW)
  • Add 5 octagonal chambers including one between flanges described below.
  • All materials are copper

Flanges and bellows between Q1 and Q2 septum (inside QOCT)

Plot
Changes in bpip.db: structure q1oct (NEW)
  • Two circular steel flanges
  • Three circular copper flanges with octagonal holes
  • Bellow (QOBL) uses air for now, should be replaced by steel-air mixture