1. R. Rosol, LIU-PSB review, 10 September 20141

2. BI.DIS Pulse generators R. Rosol, LIU-PSB review, 10 September 20142 Luc SERMEUS, Rodolphe ROSOL Laurent DUCIMETIERE

3. Contents -BI.DIS system parameters -System and pulse generators description -Present status and Planning until end 2014 -Potential issues -Spending profile -Resources -Conclusion R. Rosol, LIU-PSB review, 10 September 20143

4. BI.DIS system parameters R. Rosol, LIU-PSB review, 10 September 20144 ParameterUnitValue Deflection angle at 160 MeV (vertical) mradDIS0: 3.77 DIS1: 4.23 DIS2: 3.84 DIS3: 3.4 DIS4: 3.97 Kick flat-top durationµsDIS0: 20 DIS1: 170 DIS2: 320 DIS3: 470 DIS4: 620 Kick rise time (1-99)%µs≤ 1 Kick flat-top ripple (p-p)%≤ ±1 Magnet currentA~ 1000 A PFN impedanceΩ6.25 PFN voltagekV6.25 Repetition rateHz1.1 ~ 150µs

5. System and pulse generators description R. Rosol, LIU-PSB review, 10 September 20145 5 Pulse Forming Networks 6.25 Ω (one per magnet) + 1 spare PFN voltage up to 10 kV ( ~ 6.25 kV nominal with H - operation) IGBT switch (2 × 6.5 kV device in series) fixed duration (different for each PFN, max 620 µs) short-circuited magnet recuperation of a large fraction ( > 50 %) of the PFN stored energy (1270 J)

6. System and pulse generators description R. Rosol, LIU-PSB review, 10 September 20146 BI.DIS generators location in B361 (BCER) PFN racks Control racks

7. System and pulse generators description R. Rosol, LIU-PSB review, 10 September 20147 Each PFN rack contains two separate PFNs of 60 L-C cells maximum L-C cell PFN Rack Switch rack

8. System and pulse generators description R. Rosol, LIU-PSB review, 10 September 20148 Each PFN rack half is “hermetic” and has an integrated automatic fire detection and CO 2 injection system. Pressure relief valves have to be installed to limit the CO 2 pressure in the rack. Pressure relief valveFront cell IGBT Switch Earthing device

9. Present Status and Planning until end 2014 STATUS 09/2014 PFN mechanical design completed at 95 % (CATIA 3D models and 2D fabrication drawings). One rack and other parts ordered to allow full test of one PFN. Lab. test on a prototype PFN on-going (validation of components). Two IGBT types selected among four manufacturers to meet the pulse required rise time. Tests with full pulse length (620  s) and nominal required current (1000 A) performed but to be repeated for thermal aspect. NEXT STEPS Assemble a full PFN generator and start final tests. Check thermal performance Test and validate the fire extinguisher system. R. Rosol, LIU-PSB review, 10 September 20149

10. Potential issues As the PFN rack has to be “hermetic” to a certain extent, air cooling is not allowed (fire prevention). The main potential issue might be overheating in the PFN rack due to losses (incomplete recovery of the PFN stored energy). The lost energy is mainly dissipated in the coils. The maximum design repetition rate of 1.1 Hz might not be guaranteed. Some modifications to the rack to allow for water cooling might be necessary. Piping work will then also be needed in BCER (overcost). The rise time measured with the prototype is just at the limit of the requirements. The PFN impedance and consequently the operating voltage might have to be increased to reduce the time constant L magnet /Z PFN of the system. R. Rosol, LIU-PSB review, 10 September 201410

11. Year20082009201020112012201320142015201620172018 PV 6385 1662621,209347 EV 033201171130 AC 6013582166131 New PV 30080035030024 Metrics per year in kCHF DescriptionProvide BI.DIS pulse generator APT wu92160 Wu responsible l.ducimetiere@cern.ch Budget code65734 BI.DIS spending profile

12. Resources for 2015/16 1.Material to be ordered and delivered next year (5 PFNs) Mechanical components (rack, coils, fire detection…) Electrical components Measuring devices Miscellaneous Total: 900 kCHF 2.FSU Coils manufacture PFN and switch assembly Total: 250 kCHF 3.CERN FTE Drawings update and orders (mainly via MME subcontracting) Assembly Supervision and tests Total: 3 FTE R. Rosol, LIU-PSB review, 10 September 201412

13. Conclusion The new BI.DIS generators is now close to enter in their production phase in parallel with the completion of the design and prototype phase. Big production effort starting mid-2015 (after ELENA). Technical aspects still to be checked on full size PFN: Thermal behaviour Rise time No budget issue assuming no additional cooling required The goal of having the full system ready for installation end of 2016 should “almost” be met providing the manpower is made available. R. Rosol, LIU-PSB review, 10 September 201413

14. THANK YOU FOR YOUR ATTENTION! R. Rosol, LIU-PSB review, 10 September 201414