Simulation and Measurement of the Fringe Field of the 1.5 Tesla BaBar Solenoid

Technical Report · Tue Nov 17 04:00:00 EST 1998

DOI:https://doi.org/10.2172/9960· OSTI ID:9960

London, Georges W ^[1]

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1. SLAC

In the context of the SLAC PEP-II asymmetric e{sup +}e{sup {minus}} collider and the BABAR detector with its 1.5 Tesla solenoid, we have calculated and measured the fringe field at the nearby beam elements and at the position of the photomultipliers external to the return iron but within a specially designed iron shield. The comparisons of these measurements with the simulations based on finite element analysis are remarkably good, within about 5 Gauss at the most critical beam element. The field at the photomultipliers is less than 1 Gauss, in agreement with the simulation. With a simple method of demagnetization of the shield, a maximum field of 0.6 Gauss is obtained.

• Research Organization: Stanford Linear Accelerator Center, Menlo Park, CA (US)
• Sponsoring Organization: USDOE Office of Energy Research (ER) (US)
• DOE Contract Number: AC03-76SF00515
• OSTI ID: 9960
• Report Number(s): SLAC-PUB-7997
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
ACCELERATOR FACILITIES
COMPUTERIZED SIMULATION
DEMAGNETIZATION
ELECTRON-POSITRON COLLISIONS
PEP STORAGE RINGS
RADIATION DETECTORS
SOLENOIDS