Arbitrary function generator for APS injector synchrotron correction magnets

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Description

The APS injector synchrotron ring measures about 368 m in circumference. In order to obtain the precision of the magnetic field required for the positron acceleration from 450 Mev to 7.7 Gev with low beam loss, eighty correction magnets are distributed around its circumference. These magnets provide the vernier field changes required for beam orbit correction during the acceleration phase of the injector synchrotron cycle. Because of mechanical imperfections in the construction, as well as installation of real dipole and multi-pole magnets, the exact field correction required at each correction magnet location is not known until a beam is actually ... continued below

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15 p.

Creation Information

Despe, O.D. November 7, 1990.

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Description

The APS injector synchrotron ring measures about 368 m in circumference. In order to obtain the precision of the magnetic field required for the positron acceleration from 450 Mev to 7.7 Gev with low beam loss, eighty correction magnets are distributed around its circumference. These magnets provide the vernier field changes required for beam orbit correction during the acceleration phase of the injector synchrotron cycle. Because of mechanical imperfections in the construction, as well as installation of real dipole and multi-pole magnets, the exact field correction required at each correction magnet location is not known until a beam is actually accelerated. It is therefore essential that a means is provided to generate a correction field that is a function of the beam energy from injection until extraction for each correction magnet. The fairly large number of correction magnets in the system requires that the arbitrary function generator design be as simple as possible yet provide the required performance. An important, required performance feature is that the function can be changed or modified ``on the fly``, to provide the operator with a real-time feel during the tune up process. The arbitrary function generator described in this report satisfies these requirements.

Physical Description

15 p.

Notes

OSTI as DE95015554

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  • Other Information: PBD: 7 Nov 1990

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  • Other: DE95015554
  • Report No.: LS--158
  • Grant Number: W-31-109-ENG-38
  • DOI: 10.2172/93501 | External Link
  • Office of Scientific & Technical Information Report Number: 93501
  • Archival Resource Key: ark:/67531/metadc793747

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Creation Date

  • November 7, 1990

Added to The UNT Digital Library

  • Dec. 19, 2015, 7:14 p.m.

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  • Jan. 6, 2016, 2:43 p.m.

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Despe, O.D. Arbitrary function generator for APS injector synchrotron correction magnets, report, November 7, 1990; Illinois. (digital.library.unt.edu/ark:/67531/metadc793747/: accessed September 21, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.