Effects of superposition of detector solenoid and FFS quadrupole fields in SLC and correction methods
For the so-called superconducting FFS option with L* = 2.2 m, the MK2 solenoid does not overlap Q1, the FFS quad nearest the IP. For the permanent magnet option with L* = 0.75 m, the MK2 solenoid would overlap both Q1 and Q2. In either case an 8 m long solenoid, contemplated for the SLD detector, would overlap both Q1 and Q2. The solenoid field cannot be shielded so in an overlap region one will have a superposition of solenoid an quadrupole fields. Recently, the question was raised, What are the optical consequences when the solenoid and quad fields are superimposed. The question had not been considered before, but rough estimates suggested immediately that there might indeed be ugly consequences in terms of an enlargement of spot size at the IP. The purpose of this note is to answer the question quantitatively and to consider methods of correction of the ugly consequences.
- Research Organization:
- SLAC National Accelerator Lab., Menlo Park, CA (United States)
- DOE Contract Number:
- AC03-76SF00515
- OSTI ID:
- 6829177
- Report Number(s):
- SLAC-CN-237; ON: DE84012067
- Resource Relation:
- Other Information: Portions are illegible in microfiche products
- Country of Publication:
- United States
- Language:
- English
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STANFORD LINEAR COLLIDER
BEAM FOCUSING MAGNETS
BEAM OPTICS
QUADRUPOLES
SOLENOIDS
SUPERCONDUCTING MAGNETS
ACCELERATOR FACILITIES
ACCELERATORS
ELECTRIC COILS
ELECTRICAL EQUIPMENT
ELECTROMAGNETS
EQUIPMENT
LINEAR ACCELERATORS
MAGNETS
MULTIPOLES
SUPERCONDUCTING DEVICES
430200* - Particle Accelerators- Beam Dynamics
Field Calculations
& Ion Optics