Aug 23, 2006 Low Power HLRF System and Impact on Distributed RF System Shigeki Fukuda and Task Force Team of DRFS in KEK KEK.

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Presentation transcript:

Aug 23, 2006 Low Power HLRF System and Impact on Distributed RF System Shigeki Fukuda and Task Force Team of DRFS in KEK KEK

July 15, 2009 LowP System and Impact on DRFS 2 DRFS with a High Availability DRFS with a High Availability was presented in the High Availability Task Force Webex Meeting (Jul.8.09) Back-up MA Modulator for Higher Availability PM Focusing, No IP, Common Heater PS DC PS back-up is also possible

July 15, 2009 LowP System and Impact on DRFS 3 Needs more revision and R&D For Klystron (with the collaboration with Toshiba) –Lower the perveance to raise the efficiency aiming for the 60 % efficiency. Then exotic R&D to improve further efficiency. –Compact (silicon) oil insulation tank –Refined design of permanent focusing, making use of the S- band klystron experience. For Power Supply and Modulator –Actual circuit design which has the easy power upgradability (from a few MAKs to a large numbers of MAKs) –Disconnection device of SW developments –Design of reliable and cheap switching device of MA modulator. Cooling Issues

July 15, 2009 LowP System and Impact on DRFS 4 Low Power Option of DRFS and Full Scheme(I) Aiming for the easy upgradeability to standard scheme Partial sacrifice of DRFS operability Backup

July 15, 2009 LowP System and Impact on DRFS 5 Low Power Option of DRFS and Full Scheme(II) Aiming for the easy upgradeability to standard scheme Partial sacrifice of DRFS operability High Available DRFS without Raising Cost

July 15, 2009 LowP System and Impact on DRFS 6 Numbers of Components in DRFS ItemLow P DRFSFull P DRFSBCD Back-up Cavity26 Directional Coupler26 Magic Tee ( Hybrid) Load k W Klystron MBK 1 Focusing PM ( EM) Coil P/S000 1 Heater P/S11111 Pre Amp LLRF Interlock module Trigger Module/depend on fanout 1 MA Modulator 0.5 DC P/S 0.5 Modulator 1 Pulse Transformer 1

July 15, 2009 LowP System and Impact on DRFS 7 Cost Evaluation for the Low Power DRFS Re-evaluation from the “High Availability” webex meeting was performed as shown below. We made a cost evaluation of Low Power Scheme of DRFS as follows; DRFS “Standard” is based on the configuration of slide 4 lower figure, not the one of slide 3 lower figure. So “Standard” includes the DC PS backup and DC PS feeds the power to 26 MKAs. So both configurations has a high availability. Cost evaluation for DC PS was estimated as follows; We assume that the cost of the thyristor, capacitor and bouncer are proportional to the power increase, and transformer is proportional to the square root of the power increase. For BCD, I showed that the cost of the modulator is proportional to the square root of the power increase, and this may be a bit underestimated cost.

July 15, 2009 LowP System and Impact on DRFS 8 Cost Impact for LowP DRFS For red character, see the comments of slide 7 in this presentation. For green character, this may be underestimated. Ray in SLAC may present new Estimation.

July 15, 2009 LowP System and Impact on DRFS 9 Water Cooling Comparison RDR DRFS Scheme B DRFS Scheme A Assume the same efficiency with J-Parc DC PS Slight increase including the 2 MA modulators Some amount of increases including the13 MA modulators

July 15, 2009 LowP System and Impact on DRFS 10 Layout for Revised DRFS Scheme Add klystron in future MA Modulator & HLRF(+LLRF) Rack Other Racks Example of LowP PDS Layout DC Power Supply Space DRFS Full Scheme DRFS Low Power Option

July 15, 2009 LowP System and Impact on DRFS 11 Maintenance of Main Linac in Scheduled Shut down in LowP Here let’s consider the repairing work of main components (Only for the Main Linac) of DRFS in scheduled Shut Down for the LowP Option. DC PS and MA Modulator of 280 in Main Linac, MA Klystron of 3640 Operation hr of a year; 5,000hrs. Scheduled shut down of 3 months No. of Failure components in a year –DC PS : 28 if MTBF of 50,000 hr (assume) –MA Modulator:20 if MTBF of 70,000hr (assume) –MA Klystron:165 if MTBF of 110,000hr (assume)

July 15, 2009 LowP System and Impact on DRFS 12 Resources required for fixing main components of DRFS in Main Linac (Low Power Option) Resources Per 1 shaft –Klystron replacement of 165= 2.5 weeks*person=100 hrs*person –MA modulator replacing of 20=0.35 weeks*person=14 hrs*person –DC power supply repairing of 28=2.1 weeks*person=83 hrs*person (including engineer work of 1.4 weeks*person(55 hrs*person) Is this overestimate???) =4.95 weeks*person(198 hrs*person) per shaft Resources of whole LC =39.6 weeks*person=1584 hrs*person We needs to count another labor relating with the failure except for above causes.

July 15, 2009 LowP System and Impact on DRFS 13 Tentative Concept for Klystron Replacement in Scheduled Shut Down Total 46 MA modulators, 8 Shafts, MA 1 carrier with 2 MA modulators  3 go and come then MA modulators delivering takes 2.6 hrs with 2 person One MA modulators disassemble and install Exchange whole Rack of MA Modulator Disconnecting the cable and remove failure set Install new MA modulator Cabling Work (1 MA Modulator Exchange takes 2 hrs with 2 person) Tunnel Size Good?

July 15, 2009 LowP System and Impact on DRFS 14 Summary This presentation showed the Low Power Option of ILC in the case of DRFS Scheme. A high available full DRFS, in which DC PS and MA modulator with backup unit respectively connect to 26 MA klystrons which feed powers to two SC cavities. Low power option of DRFS are proposed in this presentation and it has an easy pass to full DRFS. Cost comparison is shown on this presentation. Study of cooling issues has just started and rough trend is shown. Maintenance scheme and improved layout drawing of DRFS is also shown in this presentation.