Presentation is loading. Please wait.

Presentation is loading. Please wait.

1 BROOKHAVEN SCIENCE ASSOCIATES Pulsed Magnet System Eric Blum, Senior Science Associate 8 th ASAC meeting for NSLS-II Project May 10-11, 2011.

Similar presentations


Presentation on theme: "1 BROOKHAVEN SCIENCE ASSOCIATES Pulsed Magnet System Eric Blum, Senior Science Associate 8 th ASAC meeting for NSLS-II Project May 10-11, 2011."— Presentation transcript:

1 1 BROOKHAVEN SCIENCE ASSOCIATES Pulsed Magnet System Eric Blum, Senior Science Associate 8 th ASAC meeting for NSLS-II Project May 10-11, 2011

2 2 BROOKHAVEN SCIENCE ASSOCIATES People Presenting on behalf of Pulsed Magnet Laboratory Staff Richard Heese Boyzie Singh Stephen Kowalski Peter Zuhoski Acknowledgements Marcello Ferreira Michael Johanson Bernard Kosciuk Guimei Wang Dick Hseuh George Ganetis Timur Shaftan

3 3 BROOKHAVEN SCIENCE ASSOCIATES Booster Pulsed Magnets TypeH Aperture (mm) V Aperture (mm) Total Length (m) Field (T) Pulse Length (S) Pulse Shape Injection Septum E-61/2 sine Extraction Septum E-61/2 sine Pulsed Bump6020< E-3full sine Injection Kicker E-9215 nsec rise/fall Extraction Kicker E-9215 nsec rise/fall

4 4 BROOKHAVEN SCIENCE ASSOCIATES Pulsed Septum Magnets Vladimir Kiselev, Final Design Review, 2/10/ μs, ½ sine T injection 0.8 T extraction

5 5 BROOKHAVEN SCIENCE ASSOCIATES Septum Pulser L – extraction septum (2.06  H) R1, R2 – 2W 10 Ohm UXP 300, EBG C1, C2 – capacitor banks 300  F 2.5 kV, General Atomics Q1, Q2 – IGBT module FZ3600R17, EUPEC U1 – 1C24-P250, UltraVolt Alexandr Erokhin, Final Design Review, 2/10/2011

6 6 BROOKHAVEN SCIENCE ASSOCIATES Pulsed Bump Magnets Vladimir Kiselev, Final Design Review, 2/10/ ms full sine 0.47 T

7 7 BROOKHAVEN SCIENCE ASSOCIATES Injection and Extraction Kickers Vladimir Kiselev, Final Design Review, 2/10/ T extraction T injection

8 8 BROOKHAVEN SCIENCE ASSOCIATES Extraction Kicker Pulser Injection kicker is similar but uses a single pulser for the one kicker module and has a saturable choke to suppress post pulse oscillations. Amplitude stability requirement < 0.5%. Cold cathode thyratron 310 ns flat top <210 ns rise and fall times <0.2% amplitude stability

9 9 BROOKHAVEN SCIENCE ASSOCIATES Current Status Status Systems under construction at BINP First kicker ready for review early July We hope to receive the first kicker at BNL soon after completion Magnets are due to arrive at BNL by Spring, 2012 Risks BNL staff is unfamiliar with the cold cathode thyratron Kicker flat top ripple specification is extremely stringent Mitigation Requested spares for the thyratron BNL is developing a pulsed magnet laboratory to verify magnet performance

10 10 BROOKHAVEN SCIENCE ASSOCIATES Pulsed Magnet Laboratory The pulsed magnet lab accomplishes the following tasks: Train NSLS-II staff in pulsed magnet technology -Understand pulsers -Correct problems when the magnets arrive -Fix the magnets when they break Build proof of concept prototypes –Write reasonable specifications Verify performance of purchased kickers –Magnetic measurements

11 11 BROOKHAVEN SCIENCE ASSOCIATES Pulsed Magnet Laboratory

12 12 BROOKHAVEN SCIENCE ASSOCIATES Pulsed Magnet Laboratory Capabilities Conduct magnetic measurements on all pulsed magnets Understand and develop pulsers –Thyratron –IGBT –SCR Test ceramic chamber coatings

13 13 BROOKHAVEN SCIENCE ASSOCIATES Test Kicker Similar to booster kickers 43 mm (v) x 70 mm (h) x 500 mm (length) 500 Gauss field 200 ns rise 300 ns flat top <±0.4% flat top irregularity

14 14 BROOKHAVEN SCIENCE ASSOCIATES Test Kicker

15 15 BROOKHAVEN SCIENCE ASSOCIATES Test Kicker Pulser

16 16 BROOKHAVEN SCIENCE ASSOCIATES Measurements Current (1500 A peak) Enlargement of Flat Top ~±0.3% Ripple

17 17 BROOKHAVEN SCIENCE ASSOCIATES Pulsed Magnet Lab Plans Magnetic measurement system Completing analog integrator for field probe Translation stage for field probe –Automated measurement of integrated field vs. transverse position –Manual adjustment of vertical position Designing curved probe for septum measurements

18 18 BROOKHAVEN SCIENCE ASSOCIATES Pulsed Magnet Lab Plans Ceramic chamber coating characterization Technique described by Doose, et. al., from the APS at PAC 97. Works by measuring coupling of an AC field from a coil outside the chamber to the coating inside No contact with inner surface, thus no risk of damage or contamination Can find local variation of coating thickness

19 19 BROOKHAVEN SCIENCE ASSOCIATES Pulsed Magnet Lab Plans Starting to develop storage ring diagnostic pinger magnets Horizontal PingerVertical Pinger Deflection Angle<3 mR<2 mR Pulse length and shape2.6 μsec, ½ sine Magnet Length300 mm Required field0.1 T0.067 T Magnet Inductance0.84 μH (+.25 μH leads)0.12 μH (+.27 μH leads) Capacitance, voltage, current0.52 nF, 3.75 KV, 3.2 KA1.58 nF, 2.87 KV, 5.4 KA

20 20 BROOKHAVEN SCIENCE ASSOCIATES Storage Ring Pulsed Magnets 4 kickers T <5.2 μs half-sine 1 septum 0.85 T <200 μs sine

21 21 BROOKHAVEN SCIENCE ASSOCIATES September 2010 Review Original proposal Orbit distortion <10% of stored beam size outside injection straight at SR source points Amplitude error < 4 x Timing jitter <74 ps Roll Error 10 μrad Septum leakage field < 6 μT-m Review said this was far too stringent Provided a table of achieved performance at other light sources

22 22 BROOKHAVEN SCIENCE ASSOCIATES Storage Ring Pulsed Magnet Specifications In response to the review we revised the specs as follows Kicker –Waveform amplitude variation <0.1% –Timing jitter < 1 ns Septum –Amplitude variation < 0.01% –Timing jitter < 10 ns –Leakage < 30μT-m

23 23 BROOKHAVEN SCIENCE ASSOCIATES Storage Ring Pulsed Magnet Tuning SPEAR 3 example Safranek reduced orbit errors from 1 mm peak-to-peak to 20 μm by adjusting kicker amplitude, timing, and xy coupling using skew quads and a special multipole magnet We will have remote kicker roll adjustment

24 24 BROOKHAVEN SCIENCE ASSOCIATES Storage Ring Pulsed Magnet Supplies

25 25 BROOKHAVEN SCIENCE ASSOCIATES Storage Ring Pulsed Magnet Status Status Kickers and septum out fo bid –Purchase to include -5 kickers -1 septum -Pulsers and charging power supplies -Stands and supports -Vacuum chambers for the pulsed magnets -All cables and wiring 5 vendors were contacted Bids are due in early June Risks No bids Bids will be too expensive

26 26 BROOKHAVEN SCIENCE ASSOCIATES Conclusions BINP construction of booster pulsed magnets well underway. BNL pulsed magnet lab is preparing to measure the magnets when they arrive Storage ring pulsed magnets are out for bid.

27 27 BROOKHAVEN SCIENCE ASSOCIATES Additional Slides Magnet specification tables follow

28 28 BROOKHAVEN SCIENCE ASSOCIATES Booster Pulsed Septum Magnet Specifications Type of a magnetInjectionExtraction EnergyMeV Deflection anglemrad Effective lengthm Total lengthm Magnetic fieldT Aperture (hor  ver) mm 2 52  3040  16 Copper conductor sizemm 2 3  28314314 CurrentA Resistance (at 30  C)mm Inductance HH Pulse length (1/2 sine) ss 100 Maximal voltageV Power loss per magnet(2 Hz)W235 Field stability% Total magnet weightkg Lamination thicknessmm0.35 Vladimir Kiselev, Final Design Review, 2/10/2011

29 29 BROOKHAVEN SCIENCE ASSOCIATES Booster Pulsed Bump Magnet Specifications Number of magnets4 Gapmm33 Magnetic field amplitudeT0.47 (0.54) Effective magnetic lengthm0.17 Bending anglemrad7.5 (8.5) Good magnetic field regionmm ± 20 Non-homogeneity within good field region 1  Overall length of the magnet along the orbitmm< 200 Lamina thicknessmm0.5 Number of coils2 Number of turns per coil4 Pulse length (1 sinusoid)s 3  Peak current I max A1500 (1750) Active resistance of magnetOhm0.003 Inductance of magnetH 62  Voltage drop activeV4.5 Voltage drop reactiveV200 Average power consumption per magnetW10 ( 20 -2Hz) Overall weight of magnetkg39 Vladimir Kiselev, Final Design Review, 2/10/2011

30 30 BROOKHAVEN SCIENCE ASSOCIATES Booster Injection and Extraction Kickers Name of parameterInjectionExtraction Maximum Magnetic Field (T) Effective length, mm207 Magnetic gap, mm Gap between the poles, mm Bend angle (mrad)176.2 Inductance (nH)650 Peak current on the kickers plates (A) Maximum Charging voltage of PFN (kV)21 Maximum Voltage in kickers plates (kV)1520 Drive CapacitorPFN Pulse Shape215 nsec risetime / fall time, 300 nsec flat-top 215 nsec risetime/fall time, 300 nsec flat-top Magnetic MaterialFerrite core CMD5005 Vladimir Kiselev, Final Design Review, 2/10/2011

31 31 BROOKHAVEN SCIENCE ASSOCIATES Booster Kicker Pulsers Vladimir Kiselev, Final Design Review, 2/10/2011 Parameter name Injection Extraction Single-turn injection (BU3,4SI) Beam stacking mode 2 nd pulse (BU3,4SI/BU1,2SI) Maximum current of the kicker plates (A) / Maximum pulse modulator output current / Inductance of kicker section (nH) 650 Equivalent load inductance (nH) Pulse flat top (ns) 310 Pulse rise time (ns) <210 Pulse fall time (ns) <210- Output current instability (including pulse top ripples) ±0.5% (including post pulse ripples)±0.2% PFN impedance (Ohm) Maximum Charging voltage of PFN (kV) 2021 Maximum Voltage on kickers plates (kV) 1520

32 32 BROOKHAVEN SCIENCE ASSOCIATES Storage Ring Pulsed Magnet Specifications KickersSeptum Number41 Maximum field (mT) Maximum yoke length (mm) Maximum bend angle (mrad) Septum radius of curvature (m)NA13 Magnet aperture (x vs. y) (mm)90 x 4124 x 10 Chamber Aperture (x vs. y) (mm)76 x 2520 x 7 Pulse shape½ sinesine Pulse Length (μs)<5.2<200 Maximum repetition rate (Hz)22


Download ppt "1 BROOKHAVEN SCIENCE ASSOCIATES Pulsed Magnet System Eric Blum, Senior Science Associate 8 th ASAC meeting for NSLS-II Project May 10-11, 2011."

Similar presentations


Ads by Google