Toshiba/KEK MBK for TESLA: Design, Status and …...Toshiba/KEK MBK for TESLA: Design, Status and Schedule Yong Ho Chin TESLA Collaboration Meeting DESY, Berlin January 21 -23, 2004

2004/1/262004/1/26 Toshiba/KEK, DESY, Y.H.ChinToshiba/KEK, DESY, Y.H.Chin 11

Toshiba/KEK MBK for TESLA: Toshiba/KEK MBK for TESLA: Design, Status and ScheduleDesign, Status and Schedule

Yong Ho ChinYong Ho ChinTESLA Collaboration MeetingTESLA Collaboration Meeting

DESY, BerlinDESY, BerlinJanuary 21January 21--23, 200423, 2004


Reminders from Previous TalkReminders from Previous Talk

Toshiba was inquired by DESY about its interest in Toshiba was inquired by DESY about its interest in production of a MBK for TESLA production of a MBK for TESLA in summer 2002in summer 2002..

KEK/BINP team provided a basic design of TESLA KEK/BINP team provided a basic design of TESLA MBK to Toshiba, based on our experience of designing MBK to Toshiba, based on our experience of designing a Xa X--band PPM MBK for JLC (Japan Linear band PPM MBK for JLC (Japan Linear ColliderCollider).).Toshiba improved the design for better performance Toshiba improved the design for better performance and for meeting the specifications of TESLA.and for meeting the specifications of TESLA.

The design was approved and the order was placed to The design was approved and the order was placed to Toshiba Toshiba in early summer 2003in early summer 2003..

The production is under way for the final delivery The production is under way for the final delivery in in October 2004.October 2004.


Design ParametersDesign ParametersToshiba EToshiba E--37363736 ThalesThales TH1801 TH1801 (design)(design) (measured)(measured)

Operating FrequencyOperating Frequency 1300 MHz1300 MHz 1300 MHz1300 MHzPeak Output PowerPeak Output Power 10 MW10 MW 10 MW10 MWAverage Output PowerAverage Output Power 150 kW150 kW 75 kW75 kWBeam VoltageBeam Voltage 115 kV115 kV 117 kV117 kVBeam CurrentBeam Current 132 A132 A 131 A131 AEfficiencyEfficiency 7070--75 %75 % 65 %65 %RF Pulse DurationRF Pulse Duration 1.51.5--2.0 ms2.0 ms 1.5 ms1.5 msRepetition RateRepetition Rate 10 10 ppspps 5 5 ppsppsSaturation GainSaturation Gain 47 dB47 dB 48.2 dB48.2 dBNumber of BeamsNumber of Beams 66 77Number of CavitiesNumber of Cavities 66 66Cathode LoadingCathode Loading <2.1 A/cm<2.1 A/cm22 5.5 A/cm5.5 A/cm22

Solenoid PowerSolenoid Power <4 kW <4 kW 6 kW6 kW


General General ViewView

Transverse fieldCompensation coils

Output Window

Solenoid

Output Coil

RF Interaction Part

2nd Harmonic CavityLong Drift Tube

Matching Coil

Cathode Coil

Approach#2Collector With 2nd Harmonic

Cavity

Electron Gun(6 Cathodes)


Mile Stones, Multi beam Kkystron E3736 for DESYTOSHIBA CorporationDisplay Devices & Components Control Sep. 03, 2003Electron Tubes & Devices Division

7 8 9 10 11 12 1 2 3 4 5 6 7 8 9 10 11Design Review at DESY

Design Modification

Parts Design

Parts Manufacturing

Prototype #0Manufacturing

Test at TOSHIBA

Solid state switchDesign/Manufacturing

Solid state switchInstallation

Prototype #1Design

Prototype #1Manufacturing

Prototype #1Test at TOSHIBA

Prototype #1 Delivery ＊

Acceptance Testat DESY

200312

2004

Design Review


Design UpdatesDesign Updates3MHz bandwidth requirement at 8.7MW3MHz bandwidth requirement at 8.7MW

Adding one more bunching cavity was proposed at Adding one more bunching cavity was proposed at the last design review.the last design review.However, it turned out that However, it turned out that lowering Qlowering Q--value of value of the second gain cavity only can produce enough the second gain cavity only can produce enough bandwidth (3.7MHz).bandwidth (3.7MHz).

The The hot dimension of the gun hot dimension of the gun (the actual dimension (the actual dimension when the cathode on) was calculated using ANSIS when the cathode on) was calculated using ANSIS thermal code.thermal code.

The mechanical design of the gun was revised The mechanical design of the gun was revised accordingly.accordingly.

The distance between the input cavity and the output The distance between the input cavity and the output cavity was increased slightly by 4cm.cavity was increased slightly by 4cm.


Bandwidth RequirementBandwidth Requirement

The second gain cavity


Instantaneous B andw idth

0

10

20

30

40

50

60

70

80

- 3 - 2 - 1 0 1 2 3f (MHz)

Effic

ienc

y (%

)

11mm 7.02W11mm 13.53W11mm 13.53W11mm 13.53W


Simulations results by FCI


Simulations results 2 by FCI

RF Output Energy


Thermal Calculation of GunThermal Calculation of Gun


Expansion


Cold and Hot DimensionsCold and Hot Dimensions


WindowsWindows

Windows


CollectorCollector


Distribution of Power Loss in the CollectorDistribution of Power Loss in the CollectorFor DC beam by Arsenal

0

0.1

0.2

0.3

0.4

0.5

0.6

80 85 90 95 100 105 110 115 120 125

Z-axis (cm )

Pdiss (W

/cm2)


DC sheet beam by MAGIC


Sheet beam With 50% efficiencyby MAGIC


MBK OutlineMBK Outline


Status and ScheduleStatus and Schedule

About 60% of brazing was already finished.About 60% of brazing was already finished.

The baking of the tube will start in early February.The baking of the tube will start in early February.

So, by the end of February, the PrototypeSo, by the end of February, the Prototype--0 will be 0 will be ready for testing at Toshiba, as scheduled.ready for testing at Toshiba, as scheduled.

The delivery of waveguide components has been a bit The delivery of waveguide components has been a bit slow.slow.

If the delivery of the waveguide system can meet the If the delivery of the waveguide system can meet the schedule, the testing of Prototypeschedule, the testing of Prototype--0 will start in 0 will start in March.March.

Documents

Toshiba/KEK MBK for TESLA: Design, Status and …...Toshiba/KEK MBK for TESLA: Design, Status and Schedule Yong Ho Chin TESLA Collaboration Meeting DESY, Berlin January 21 -23, 2004