Dipole for Fast Ramping Synchrotron Test Magnet Holger

Dipole for Fast Ramping Synchrotron Test Magnet Holger Witte Brookhaven National Laboratory Advanced Accelerator Group 30 May 2012

Geometry • Half size model • Dimensions – width 250 mm – height 230 mm – depth 50 mm • Weight: about 20 kg • Gap: 5 mm x 50 mm – Good field region: about 32 mm 30 May 2012 2

Magnetization 1. 3 T 1. 1 T 2 T 30 May 2012 3

ΔB/B Field Quality 30 May 2012 4

Field Quality Gap 30 May 2012 5

Power Supply • Total current: 4080 A for half magnet – current density for 2 T: 8 A/mm 2 • Magnetic energy: 25 J • PS (f=1 k. Hz): – 100 turns: I=80 A, L=7. 8 m. H, Upeak=4 k. V – 50 turns: I=160 A, L=2 m. H, Upeak=2 k. V • Capacitor (f=1 k. Hz): • 100 turns: 3 u. F • 50 turns: 12. 6 u. F 30 May 2012 6

Circuit 30 May 2012 7

Components • Capacitor: GA – DE: 2 u. F, 5 k. V, 25 k. A • 58 x 150 x 77 (mm), 1 kg – DM: 330 DM 525 • 25 u. F, 3 k. V, 1. 2 k. A • 2. 86 x 4. 56 x 4. 00 (in) • Switch: thyristor – – – 30 May 2012 Eupec TZ 240 N 3. 6 k. V, IDC=240 A+ Isurge=6 k. A Cost: $250 control electronics? 8

Charger • Dimensions – 330 x 166 x 141 (mm) • Charge rate: 500 J/s • Does not tolerate voltage reversal – switches to detach charger? – permanent charging via resistor? 30 May 2012 9

Missing components • Firing circuit – Dynex • Diode • Resistors (dumping energy) • Switches – Ross relay? • Control system • Diagnostics 30 May 2012 10