PIP Update

Aug 15th 2012

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

UpdateGeneral 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

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

FY12 Budget (~84% of FY)

Look at Task funds – make sure youas managers know what the balance is!!

FerritesBooster 2nd TransformerVacuum ComponentsKlystron

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, Kiyomi Seiya, and Dennis Barak

John Reid, Kiyomi Seiya, Dennis Barak

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

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

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

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

High loss effect – cavity pickup

John Reid, Kiyomi Seiya, Dennis Barak

Follow-on burst

John Reid, Kiyomi Seiya, Dennis Barak

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

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