Rotational and magnetic shunt permanent magnet quadrupoles with variable magnetic strength
Next Linear Collider (NLC) and Very Large Hadron Collider (VLHC) projects suppose to use permanent magnets as bending, focusing and correcting elements. Prototypes of two permanent magnet quadrupoles with variable strength were built and successfully tested in Fermilab. Quadrupoles have 12.7 mm aperture diameter, 100 T/m gradient with an adjustment range of 0 to -20%. Special designs provide high precision magnetic center stability during strength change. SmCo5 permanent magnet bricks were used in these prototypes. Rotational quadrupole consists of four sections. Two central sections are rotated in counter directions to adjust the strength. Magnetic shunt quadrupole design provides variable shunting of the magnetic flux. The numerical simulation, designs, measuring results are described.
- Research Organization:
- Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
- Sponsoring Organization:
- USDOE Office of Energy Research (ER) (US)
- DOE Contract Number:
- AC02-76CH03000
- OSTI ID:
- 793033
- Report Number(s):
- FERMILAB-Conf-01/269-E; TRN: US0200890
- Resource Relation:
- Conference: 17th Int. Conf. on Magnet Technology, Geneva (CH), 09/24/2001--09/28/2001; Other Information: PBD: 28 Mar 2002
- Country of Publication:
- United States
- Language:
- English
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