bump magnets
bump orbit at the injection section
To reduce the oscillation amplitude of injected beam, the stored
beam is moved to near the injection line (the bump orbit). This orbit is
formed by four pulse bump magnets. The waveform of the magnet is half sine
with 8.4us period.
dimensions
- pole length: 320mm (BP1,4) 170mm (BP2,3)
- gap : 56mm
- width : 112mm (BP1,4) 120mm(BP2,3)
- weight : 210kg (BP1,4) 135kg (BP2, 3)
- material : silicone steel lamination 0.1mm thick
photo of BP 2
electric property
- inductance : 5.6uH (BP1,4) 4.0uH (BP2, 3) @ 1kHz
- resistance : 1.4mOhm (BP1, 4) 1mOhm (BP2,3) @ 20 C
- two turn coil with two pair of 3mm*6.5mm Cu
- excitation current : (example) 3600A (2mrad) @ 16kV with BP1
- 1900A (0.7mrad) @ 8.2kV with
BP2
measured fields
power supply
- half sine waveform
- use of thyratron : Marconi CX1174
- Current Transformer : Pearson electronics 110A
- trigger signal from ejection pulse magnet of booster synchrotron
- timing can be adjusted using digital delay module (VME)
vacuum chamber
- use ceramics chamber
- TiMo coating inside of the ceramics
ceramics chamber for BP2
last modified on 30 Nov., 2004 by ohshima