x-band klystron development for jlc · pdf filex-band klystron development for jlc kek yong ho...
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Toshiba PPM-1
% Main emphasis
l Test a newly designed gunl Establish the know-how for
+ Design and manufacturing of PPM circuit+ Measurement method of magnetic fields+ Damping of higher-order modes+ Brazing of SUS and Monel used for tubes and
cavities
4 Design goal
a Present Status
l Design completed and now in manufacturingl The expected performance (according to MAGIC
simulation)
+ Peak power at 480kV >70MW+ Efficiency r 55%+ Pulse length > 1.5~s
l The theoretical analysis for oscillation shows thatthe potentially dangerous modes are damped byeither output couplers or lossy tubes and cavities.
l Features+ Gun
.f Tunable beam size between 2.3mm -3.3mm3 Hot dimension was estimated by the
thermal code ANSIS+ Beam-cavity interaction region
2 RF current 2 1.7~1 All cavities (except the output cavity (Cu))
are made of Monel.i All tubes are made of stain-less steel3 Output cavity with two output couplers
apart by 150 degree to damp some dipolemodes
0N
Time 13.980 ns: PHASESPACE for all particles
PHASESPACE Plot 1Remarks: Fine Mesh to z 24mm. Ideal Pierce Gun
Device: T ppm X band klystroRun No: *
Mag Larionov/ 3900AT /3OOA, Bc 14.5Gs. File: Tx.mgcAuthor: S.M.Organization: KEK
MAGIC2D Version: March 1999 Date: Sep 02,1999 Time: 13:04 Page: 16
ANSYS 5.5.2DEC 24 199911:41:tl7NODAL SOLUTIONSTEP=1SUB =ITIME=1TEMP wmRSYS=OPowerGraphicaEFACET=lAVRES=MatSMN =33.11SMX =I012
38.11103.036167.962232.888297.814362.74427.666492.592557.518622.444687.37752.296817.222332.148947.0741012
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Cavity Data of KEK PPM # 1 Klystron
Cavity l(inp) 2 3 4 5 6Position,mm 228 318 393 543 603 633Gap,- 3.6 3.6 6 4.8 7.2 5.8WQgap,Ohm 46 33 55 37 55 36IUQaxis,Ohm 89 73 123 110 121 132QC~WER 4780 4320 6220 5520 4950QMONEL
6300907 820 1180 1050 940 1200
Vgap,MAGIc,kV 0.7 10.7 72 145 127 266 200Vgap,DAh4PER 0.7 10.0 70.8 132 119 237 200DamperConduc. - 0.032 0.039 0.034 0.026 0.Esurf,kV/cm - - - 360 270 610 460P, W/lOOpps - - - 40 23 123 70*m O? -40 50 250 350 350 450F2~~110,MJdz 15880 15211 15920 15590 15818 15884,F31x111 18662 18666 17577 17120 16925 16614Coupling Mode I- 18675-----ITrape Mode 1 I------- 18526 ----ITrape Mode2 I 18594 __________ 1Trape Mode3 Ia-_----- 188(&w- ______________ 1
Trape Mode4 IB--------m1 gg77- --------------- 1Trape Mode5 I---------- -1g10’2- --------------- 1Trape Mode6 I----------- ----- +gg ----- - --------------------- 1Output System Traped Mode, MHz:HFSS Qfactor MAXWELL RFBEAM Fbeam,MHz---s---w---- Azimuth Symmetry Modes--------------------------------9780 200 9767 no problem- - 11001 no problem- - 12140 no problem
12690 180 12752 no problem1 9 7 4 0 1 3 0 0 1 9 6 0 9 n o p r o b l e m21400. ..126 21414 unstable about40OkV Q?=lOOOO 21500m - i -., --- - - - D i p o l e M&s, m=l-:- . ‘.iO950 .?200.0. ‘:.‘ 10918 i :. :
‘?T”“““““‘-------------.
li490 .?2000fidproble:ein. :::: :-L ‘.
12397 ” i. . no problem : I < : _.14380. . I 480..:. 14341 : ‘. : no problem -‘I15780 560 j.5784Qua&q& h&des m&2.
unstable V>300-4OOkV; .&lOOO 15810
16670 2‘10 ‘.S&&*1& Modes m=3:
20930 >500 ’ *17400 go0 . . 21780 >500 ,.19120. 530 : < 2 2 6 8 0 >50020540 ~100
I ZMIN= 618,88 ZMAX= 714.88 RUIN= .80 RMAX= 78,79 FILE:OUT3Z= 618,88 R= a88 MODE NUMB= 12 CURRENT NODE= 8 FMODE= 15784.21MH2
READ FILEMODE NUMBERNORMALIZEGAUSS NUMBERST-STEP FIELDWINDOWSURFACELINEAREA FIELDD-NODE FIELDE-FIELD LINEH-FIELD LINEPOINT FIELDSFORCE LINECLEARQUITt - HOWDIALOGUE ED:ESC \ END
Dipole mode in Output System. F=15784 MHz r=O...4mm
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_ 2.OE+OO4 ,Dipole mode in Output System. F=l5784 MHz r=*O...4mm
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0Z, mm
-20
-30
-40
g
-50
-60
-70
120, 150, 160, 170, 180gr. output wavegides
Sl to s2
- 120gr,Q =???- lGOgr,Q =210__ 170gr,Q =420- 18Ogr,Q=630--~-- 15Ogr,Q =llO
15.0 15.2 15.4 15.6 15.8 16.0 16.2 16.4 16.6 16.8 17.0
GHz
-10
Sl to P2
-20
-30
-50
-60
15.0 15.2 15.4 15.6 15.8 16.0 16.2 16.4 16.6 16.8 17.0
GHz
- 120gr,Q =???- 160gr,Q =200-- 170gr,Q =420- 180gr,Q=630
- 150gr,Q=llO
150°
4
9.957079E-015 .34‘ 3-q F-,1--ii..- -2.4528423-037.553962E-02
i . ; 5 3 3 e c, 2 _ &; ;2.1599533-027 .<;;y::c--,_-
9.9930033-01 15.4274203.043572E-02 123.595800
6.433687E-01
-25.77909069 .29-^392
129.703600102.794700
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89.81141053.22?57j
21.816930
160'
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9.980403E-01 -25.9100502 . c _ L :_ _.-- l>~~~:-,-,' -r zrrc:-. _ C". ,YL.. I1.803148E-03 129.7929005.107319E-02 102.983000
-.;:562050E-02 ‘^7c3’- _ -:-I> - - 89.895810 -2 dA . 3 3 - -1 : ,:
.G'L;E';c--',_ 54.115?),>
9.9916843-01 15.4350403.318679E-02 123.866800
6.4131993-01 22.335500
180'
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9.999999E-014 . ~5;1F'c-?-_- _-- -34.4581763-059.391773E-05
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9.9904973-01 15.4353903.552474E-02 124.046100
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6.393195E-01 22.870810
900
800
700
600
SSOO
Voltage Threshold of Generations of ‘PPM#Z Klystron(Zp;naig sign of Interaction Power. Thin Beam Model
simufatrons 25/l l/99MAXWELL Cavity Cakulations File&CAVm, CAV4POISSON PPM Calculations File: OUTSFl 00
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LINEAREA FIELDD-MODE FIELDE-FIELD LINEH-FIELD LINEPOINT FIELDSFORCE LINE .CLEARQUITt - HareDIALOGUE ED:ESC \ END
DOWSURFRCELINE .AREA FIELDD-MODE FIELDE-FIELD LINEH-FIELD LINEPOINT FIELDSFORCE LINECLEARQUITt - HomeDIALOGUE ED:ESC \ END
Toshiba PPM-2
II Design goal
l Manufacturing of a PPM klystron that meets thespecs of JLC
l Overhaul of design and manufacturing process forfuture mass production
l Toshiba PPM-2 will be ordered in Summer 2000after its design will be adjusted according totesting results of Toshiba PPM-2
l High power testing is scheduled to start fromSpring 2001.
I Main changes from Toshiba PPM-1l Water cooling for a higher repetition ratel Clamp-on PPM for future mass productionl A new high power Kazakov windowl A new modulator for a higher repletion rate
(150Hz) and a longer pulse (3~s)