1. PIP Update Aug 15th 2012

2. Agenda • Summary Update • Current Activities • Dennis Barak / Kiyomi Seiya - High-Power Ferrite Testing • Ryan Crawford - Linac and Booster Transformers • Salah Chaurize/ Vladimir Sidorov- L13 Absorber

3. Update General Info • Current Work • Booster RF cavity 5 – Tuners installed then removed due to spacing issues…..Aug 10 Log Entry • Linac Transformer – Slides • Booster Transformer – Could we order another one? • LCW – Work continues still on schedule? • RFQ – beam tests continue finishing up – meeting today to set schedule • REPORT for High Power – Preparing for submission/Meeting today to review • High Power Ferrite Testing - Progress - • Booster Absorber – Progress – see slides • Linac Modulator – Testing at 7 for DTI continuing – any comments • Modulator – SLAC / Continental will be here next week to present their plans • Booster Modulators – Aug. schedule says we should see half of Mods completed? • Cogging – working on hardware/frontend/code • Booster penetrations will be filled again soon – all cables pulled (SS) ? • RLS – Elmie Comments Shutdown - comments (Fernanda, Todd, Mary) PIP PMG August 2nd – Went well – a lot of details • TOPIC Presenter Time Description • Introduction/Management Pellico 20 Minutes History, goals and guidelines • Linac Fernanda 20 Minutes Linac (tasks, milestones/goals) • Booster Keith 20 Minutes Booster (tasks, milestones/ goals) • RLS/Project Controls Elmie 15 Minutes RLS schedule – base line/update(s) • Budget Constraints Bob 15 Minutes Budget and targeted goals issues

4. Upcoming Schedule/Events • Linac HLRF meeting today to review JS report • Next Week will try to meet with management to present • RFQ Injector looks to be ready • Meeting today to summarize recent studies • Approve Installation • Discuss near term plans • Linac Modulator • Vendors visit next week to discuss their plans • PIP Quarterly report over due • Turn in on Friday? • Linac Transformer installation schedule completed

5. FY12 Budget (~84% of FY) Look at Task funds – make sure you as managers know what the balance is!! Ferrites Booster 2nd Transformer Vacuum Components Klystron

6. Last week • No bias current • Resonant Frequency: 34.963 MHz • Forward power: 5.04 kW • Reverse power: 729 W • Cavity voltage: 2.7375 V (p-p) • Q = 64.6 at ~5 kW • No high loss effect observed John Reid, KiyomiSeiya, and Dennis Barak

7. Plan of attack • Try another Toshiba core (these are the lossiest cores that we have) • Make high power measurements of the fixture without any cores inserted • Including Q • Introduce a bias current and make high power measurements • Try a new core? John Reid, Kiyomi Seiya, Dennis Barak

8. TOS 0979 core • No bias current • The high loss effect was not observed even with 6.57 kW of forward power. • Q measurements • Q = 67.4 at about 5 kW (SG set to +7.1 dBm) • Q = 87.5 at lower power (SG set to 0 dBm) • Very similar to the other Toshiba core (TOS 9070) John Reid, Kiyomi Seiya, Dennis Barak

9. Measurements of unloaded structure • Forward power: 4 kW • Reverse power: 389 W • Resonant frequency: 42.2975 MHz • Cavity voltage: 10.825 V • Q measurements • Q = 669 (SG set to +7.1 dBm) • Q = 778.6 (SG set to 0 dBm) • Q did not change too drastically compared to the loaded structure John Reid, Kiyomi Seiya, Dennis Barak

10. Try biasing the core • Slowly increased the bias current while finding the resonant frequency with each change in bias current • The high loss effect was observed with a bias current of 1500 A • TOS 0979 core • Forward power: 4.289 kW • Reverse power: 328 W • Cavity pickup voltage: • 6.2 V before high loss effect • About 5 V after high loss effect John Reid, Kiyomi Seiya, Dennis Barak

11. High loss effect – cavity pickup John Reid, Kiyomi Seiya, Dennis Barak

12. Follow-on burst John Reid, Kiyomi Seiya, Dennis Barak

13. High loss at maximum bias current? • Bias current: 10,000 A • Forward power: 4.22 kW • Reverse power: 243 W • Cavity pickup voltage: 11.125 V (p-p) • SG setting: +9 dBm • Q: 655 • No high loss effect John Reid, Kiyomi Seiya, Dennis Barak

14. Next steps • Compare these measurements to older data • Place a stackpole core inside the structure and make the same measurements • Try a new core • Continue to characterize our measurements • Possible issue: • The return bus bar was getting hot at 10,000 A. • The current was dropping by about 5 A every single pulse while components were warming up. • Testing of new ferrites will start once we understand the results that we are getting John Reid, Kiyomi Seiya, Dennis Barak