A new Tevatron Collider working point near the integer
It is well established that in hadron colliders the beam-beam interaction is more harmful in the presence of machine resonances of the form m{nu}{sub x} + n{nu}{sub y} = p, where {vert bar}m{vert bar} + {vert bar}n{vert bar} is the order of the resonance. Since the closest a resonance line can be to the integer stopband is 1/order, the closer the working point is to the integer, the fewer lower order resonances there are to enhance the beam-beam effects. A shift of the working point of the Tevatron from 19.4 to values near 19 and 20 has been studied. Problems with closed orbit control, dispersion matching, and matched low {beta} insertions were considered. An excellent solution for the B0 insertion was found which has an improved {beta}*. A new injection optics allows a transition to the low {beta} optics which is much easier than the one now used. Results from the first machine studies demonstrate the ability to control the orbit with tunes of 19.03 horizontal and 20.03 vertical. Further studies require the activation of additional quadrupole compensation circuits. 4 refs. , 2 figs.
- Research Organization:
- Fermi National Accelerator Lab., Batavia, IL (USA)
- Sponsoring Organization:
- DOE/ER
- DOE Contract Number:
- AC02-76CH03000; FG05-87ER40374
- OSTI ID:
- 5034612
- Report Number(s):
- FNAL-TM-1638; CONF-890335--273; ON: DE90006393
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
430200* -- Particle Accelerators-- Beam Dynamics
Field Calculations
& Ion Optics
ACCELERATORS
BARYON-BARYON INTERACTIONS
BEAM DYNAMICS
BEAM EMITTANCE
BEAM OPTICS
BEAM-BEAM INTERACTIONS
CYCLIC ACCELERATORS
FERMILAB TEVATRON
HADRON-HADRON INTERACTIONS
INTERACTIONS
NUCLEON-ANTINUCLEON INTERACTIONS
PARTICLE INTERACTIONS
PERFORMANCE
PROTON-ANTIPROTON INTERACTIONS
SYNCHROTRONS
TUNING