1 / 16

LINAC LOW ENERGY MODULATORS status update

FERMILAB DESIGN Howie Pfeffer /Jim Biggs 12/19/12. LINAC LOW ENERGY MODULATORS status update. Fermilab specs. SOME SPECS Pulse rep rate: 15 Hz Maximum Output: 35 kV Load ~100 ohm Rise time (Adjustable): 150 usec

lonato
Download Presentation

LINAC LOW ENERGY MODULATORS status update

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. FERMILAB DESIGN Howie Pfeffer/Jim Biggs 12/19/12 LINAC LOW ENERGY MODULATORSstatus update

  2. Fermilab specs SOME SPECS Pulse rep rate: 15 Hz Maximum Output: 35 kV Load ~100 ohm Rise time (Adjustable): 150 usec Fall time (Adjustable): 150 usec Flat top time (Adjustable): 160 usec Beam Length/Time (Adj.): 110 usec Maximum step size: 1.5 Kv SOME OF THE TOUGH SPECS: Beam Top Tilt (Adj.): +/- 5 kV Beam Voltage Step SR: 15 kV/usec Flattop/Beam Regulation: +/- 25 V Repeatability: +/- 10 V Maximum sparkEnergy: < 5 Joules Essentially a 35kV, 350 amp, OPAMP Capable of 15 kV/usec slew rate

  3. Block diagram of proposal

  4. Marx ps block diagram

  5. Basic Test circuit Snubber Current Generation Circuit

  6. Basic Test circuit

  7. Current with step Current

  8. Igbt 40u.5.6uhi direct Current Collector Volt Emitter Volt

  9. Snubber capacitor mounting

  10. Short circuit during turn on test circuit

  11. 900 volt – gate voltage Collector Volt Gate Volt CT1 Current Gate Control

  12. 900 volt, 20 usec Gate Volt Collector Volt CT1 Current CT2 Current

  13. Short during pulse test circuit

  14. IGBT Switching action has been confirmed with acceptable transient voltages. IGBT short circuit current limiting and safe turn-off have been confirmed for turning on into a short and “spark-type” short circuits. Design for a 10 stage pulser is complete. conclusions

  15. Starting to specify and order parts for 10-stage Expect to have parts ordered by end of January Parts should be here in 3 months Begin mechanical design and layout beginning of February. Future plans

More Related