Skew quad compensation at PEP

Technical Report · Sat Oct 01 00:00:00 EDT 1977

OSTI ID:6401884

Murray, J J

Rotational and focal effects of solenoids used in PEP detectors will cause severe perturbations of machine beam optics and must be corrected. Ordinarily this would be accomplished by the addition of compensating solenoids and adjustment of insertion quadrupole strengths. It has been found that an arbitrary cross plane coupling representing the effects of solenoids and/or skew quads in any combination can be synthesized (or compensated) exactly using a quartet of skew quads combined with other erect transport elements in a wide variety of configurations. Specific skew quad compensating systems for PEP have been designed and are under study by PEP staff. So far no fundamental flaws have been discovered. In view of that, PEP management has tentatively authorized the use of such a system in the PEP-4, PEP-9 experiments and proposes to leave the question open ''without prejudice'' for other experiments. Use of skew quad compensation involves an imponderable risk, of course, simply because the method is new and untested. But in addition to providing the only known method for dealing with skew quad perturbations, skew quad compensation, as an alternate to compensating solenoids, promises to be much cheaper, to require much less power and to occupy much less space in the IR's. The purpose of this note is to inform potential users of the foregoing situation and to explain skew quad compensation more fully. 2 refs., 1 fig., 1 tab.

• Research Organization: Stanford Linear Accelerator Center, Menlo Park, CA (USA)
• DOE Contract Number: AC03-76SF00515
• OSTI ID: 6401884
• Report Number(s): SLAC-PEP-NOTE-256; ON: DE89006297; TRN: 89-004594
• Resource Relation: Other Information: Portions of this document are illegible in microfiche products
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
BEAM OPTICS
CORRECTIONS
BEAM BENDING MAGNETS
MATRIX ELEMENTS
PEP STORAGE RINGS
QUADRUPOLAR CONFIGURATIONS
CLOSED CONFIGURATIONS
ELECTRICAL EQUIPMENT
ELECTROMAGNETS
EQUIPMENT
MAGNETIC FIELD CONFIGURATIONS
MAGNETS
MULTIPOLAR CONFIGURATIONS
STORAGE RINGS
430400* - Particle Accelerators- Storage Rings
430200 - Particle Accelerators- Beam Dynamics
Field Calculations
& Ion Optics