HESR

1
HESR

• DIRAC Secondary Beams
• Kickoff Meeting
• GSI, 14-Apr-2005

Raimund Tölle, FZJ with input by colleagues from
TSL Uppsala, GSI, FZJ
2
HESR lattice
3
HESR, technical

• storage ring
• pmin 1.5 Gev/c (b0.848)
• pmax 15 GeV/c (b0.998)
• circumference 570 m
• frequency range 440 kHz 520 kHz
• internal experiments ? PANDA
• electron and stochastic cooling
• unpolarized anti-protons
• STI, TAC provisions for polarization upgrade for
  an excellent physics program! (? PAX, ASSIA)

4
HESR beam parameters

• High luminosity mode
• Average luminosity 21032 cm-2 s-1
• (Dp/p)rms 10-4
• High resolution mode
• Average luminosity 21031 cm-2 s-1
• (Dp/p)rms 10-5
• whole momentum range?
• Nmax(pbar) 51011 per pulse

5
HESR where are we now?

• TR has been delivered
• Discussion on optimizing the system is now in
  its first round
• Strong forces to use less money throughout FAIR ?
  redefinition of parameters?
• For HESR include synchrotron mode
• The EU money for this DS is an important brick
  stone that allows us to start RD work NOW.

6
Work packages in the DS

• WP1 Cavity
• WP2 E-cooler
• WP3 Stochastic cooling system
• WP4 Beam dynamics

7
WP1 Cavity (A. Schnase, FZJ)

• Build prototype of a barrier bucket cavity
  (needed for ion clearance, FNAL)
• Parameter definition, material choice, material
  test, construction of prototype
• BUT change of conditions (to save money of high
  energy beam lines, HESR has been asked to
  accelerate synchrotron mode!)
• EU contribution 100 k
• FZJ contribution 430 k
• No further statements on this occasion
  

8
WP2 electron-cooler D. Reistad, Uppsala
University

• CHALLENGE To cover the whole energy range of the
  HESR an 8 MV electron cooler is required.
• Record holder is FNAL e-cooler, presently tested
  at 4.3 MV.
• ? see talk by Dag Reistad tomorrow
• EU contribution 860 k
• UU contribution 680 k

9
WP3 Stochastic coolingH. Stockhorst, FZJ

• Develop new components suited for stochastic
  cooling system for antiprotons (e.g. pickups)
• ? see talk by Hans Stockhorst tomorrow
• EU contribution 81 k
• FZJ contribution 463 k
• GSI contribution 272 k

10
WP4 Beam dynamicsO. Boine-Frankenheim, GSI

• Accompany the developments for HESR with
  theoretical models, emphasis on luminosity
  optimization
• ? see talk by Oliver Boine-Frankenheim tomorrow
• EU contribution 234 k
• FZJ contribution 178 k
• GSI contribution 227 k
• UU contribution 211 k

11
Relation to HESRs RD program
DIRAC 2nd Beams
WP2
WP3
WP1
12
Thank you for your attention
13
Colleagues in the HESR consortium
Team Members, most of them presently working part
time for HESR
R. Maier, FZJ, IKP, Team Leader D. Reistad, UU,
TSL, Deputy Team Leader M. Steck, GSI, Deputy
Team Leader
14
Relation to other HESR activities

• FZJ, GSI and UU (TSL) form the HESR consortium,
  lead by FZJ (R. Maier)
• The Design study work is well integrated in the
  overall work for HESR

15
HESR lattice status

• Principal lattice is worked out
• Second order achromat in the arcs
• Dispersion free straights
• Current activity include insertions
• E-cooler ß 100 m
• Stoch. Devices ß 75 m
• Target place (PANDA) ß 1 m