Article : [SHEET194]

Titre : D.G. McGHEE, Pulsed Power Supply for Three APS Septum Magnets, LS Note 170, March 24, 1991

Cité dans : [DATA042] Recherche sur l'auteur Istvan SOMOS, mars 2000.

Info : LS Note 170
Date : March 24, 1991
Lien : ls170/ls170.html
Site : http://www.aps.anl.gov/techpub/lsnotes/ls170/ls170.html
Stockage : Thierry LEQUEU

Abstract :

Three septum magnets will be operated at a repetition-rate of 2 Hz. Two of the septum magnets are
identical and operate at the same values; these are the synchrotron extraction and the storage ring
injection magnets. They are transformer septum magnets, with a primary inductance of 23 µH and
resistance of 6.3 mOHM, and must be pulsed at a 2 Hz rate to extract beam from the synchrotron and
inject beam into the storage ring at 7.7 GeV. The third septum magnet is used to inject electrons
into the synchrotron at 650 MeV or positrons at 450 MeV. It is also a transformer septum magnet,
with a primary inductance of 21 µH and resistance of 6.7 mOHM, and must be pulsed at a 2 Hz rate.
A design study was performed of the power supply proposed in the APS Title I design. This supply
produces a pulse that is approximately a half-sine-wave with a base width of approximately 1/3 ms;
its peakcurrent is adjustable from 470 A to 4.7 kA and is repeatable within ±0.05%. The septum
steel is reset by a half-sine pulse of reverse polarity a few milliseconds after the forward current
pulse. No beam is present during reset. The use of the transformer design minimizes the cost of the
capacitors used for energy storage.

References : 2
[1] : D.G. McGhee, "Pulsed Power Supply for PAR Injection/Extraction Septum Magnet," ANL Light Source Note, LS-159, September 23, 1990.
[2] : D.E. Piccone, I.L. Somos, and W. H. Tobin, "Piecewise Simulation (PS) Computation Method for Computing Transient Phenomena," IEEE-IAS Annual Meeting, September 1975, Page 326-331.

  [1] :  [PAP158]  -------
  [2] : [SHEET195] D.E. PICCONE, I.L. SOMOS, W.H. TOBIN, Piecewise Simulation (PS) Computation Method for Computing Transient Phenomena, IEEE-IAS Annual Meeting, September 1975, pp. 326-331.

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