Ideas from Chuck Ankenbrandt

January 10, 2003

• Collimation or beam tailoring in Linac: is there something that can be tried in a hurry?
• Are there significant electron cloud effects in the Booster?
• Is the observed pattern of residual radioactivity understandable?
• Does longitudinal space charge interfere with adiabatic capture?
• IPM
  • Can it be believed?
  • Storage ring and accelerator modes
  • Bump beam to wall
  • Look just after beam is extracted
  • Look with/without beam gap
  • Look with variable amounts of rf
  • Accelerate beam out of aperture while running in storage ring mode
• Beam bump to wall
  • Programmed 3-bump
  • Beam extinction curve gives info about beam transverse distribution
  • Eventually, instrument the "wall" with wires to get horizontal and vertical distributions simultaneously
• Space charge
  • Does it help to split the tunes, say (6.4, 6.9)?
• Coherent transverse instabilities
  • Measure and document the phenomena
  • Can they be tuned away, or do we need dampers?
• Transition jump system
  • Get ready to commission it, i.e.
  • Get it running
  • Measure closed orbits before and during pulse
  • Develop software for quad moves
  • Devise bunch spreader
• Shadow apertures in magnets
  • E.g. ceramic pipes in D magnets downstream of long straights to move losses from rf cavities to inside of magnets