KEK test area plans
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Transcript of KEK test area plans
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KEK test area plans
Shuji MatsumotoAccelerator Lab., KEK
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Two X-band high power stations in KEKKT-1 (50MW)
Klystron Test,Small experiments (in Lead shield box)
Test area in Shield-A
Nextef (100MW)
Modulator and twin klystrons
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What to be pursued by KEK X-band• Practical structure evaluation and develop high
power system– Aiming at CLIC design Minimum required power and pulse width are ~ 75MW and ~ 240ns. Nextef is our only choice to conduct this work. These parameters are just we
are operating. Introducing power compression system is needed beyond these.
• Basic research on high gradient– Study with: Single-cell, Narrow waveguide, C10, CD10, … Required the power as low as10MW to very high >>100MW with pulse width
~500ns. KT-1 is suitable for these works . We may use Shield-B with Nextef klystrons.
• Development of components and devices – load, directional coupler, …, Klystron, …
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25 MW×2 Klystons×gain=3→ 150MW
Klystron
Accelerator
TE11R
TE11L
750ns → 150nsGain = 3.6 @ 3dB
22m - One ChannelKlystron
Accelerator
1500ns → 300nsGain = 3.3 @ 3dB
TE11R
TE11L
TE12LTE12R
TE11 ModeConverter
TE11-TE12
Reflector
Upgrade using higher mode
2009 version
Pulse Compressor (circular TE11 / TE21) proposed by M. Yoshida.
final version
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Gycom High-Q Cavity PC
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Q=20 000
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ProposalPulse compression systems
Construct Yoshida PC of “final version” (double-mode version). The compressed power goes to Shield-A for the structure test.
Test of High-Q Cavity PC at Nextef. The (maximum) power of 50MW with 1.5us will be available for the test.
High-Q Cavity PC may be installed at KT-1.
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Pulse compressorsNextef KT-1
Source RF Compressed(Gain=3)
Source RF Compressed(Gain=2.5)
1500ns 300ns 1500ns 300ns
25MW X 2 150MW 25MW 60MW
YoshidaDelay Line PC with Double Modes
Gycom High-Q cavity PC
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01020304050607080
0 200 400 600 800 1000 1200 1400 1600
ns
MW
PPM4 2003)(PPM4G2A(2006)
Plots of Pulse Shortening Events on Power / Width plane.
Comment : Practical operation limit of PPM Klystron
25MW,1.5us
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TE11/TE21 PC Configuration
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Reconfiguration of transmission lines
Current configuration Proposed configuration
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Nextef Area as of July 3.Nextef Klystrons and Modulator
Phi-80 Circular
waveguide
Shield-A(T18 Disk-> T18 Quad )
Shield-B
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Nextef Planningrevised on July 1,2009.
1 2 3 4 5 6 7 8 9 10 11 12 1 2 3 4 5 6 72009 2010
T18_VG2.4_Disk #2 TD18_VG2.4_Quad
TD18_VG2.4_Disk T18_VG2.4_Disk #4
C-band line from KT-2
RF transmission test, SKIP test, structure (CKM-004) test
NWG Cu-005 Conditioning of PPM-06bComponent tests
A
B
KT-1
C-band Structure Test
Gycom Pulse Compressor test
X-band transmission line construction
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Nextef Configuration
KT-1X-band
KT-2C-band
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ConclusionNextef
Sheild-A:
•We continue X-band structure tests.•Delay Line Pulse Compression system will be installed in FY 2009. 150MW 300ns pulse is expected.• DLPC starts operation in early summer 2010 after a 2m-long C-band structure test. ( The test starts in April 2010. Note the test occupies the delay line.)
Sheild-B: •X-band power line will be established from Nextef klystrons.
KT-1•Continues tests of RF loads as well as klystron test.•Install Gycom Cavity PC after its test(proposal).
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Nextef planning (longer period)1 4 7 10 1 4 7 10 1 4 7 10 1 4 7 10 1 4 7 10
2008 2009 2010 2011 2012
Establish system with KX03
T18_VG2.4_Disk #2
TD18_VG2.4_Quad
TD18_VG2.4_Disk
T18_VG2.4_Disk #3
Pulse compressionInstallation and commissioning
C-band structure test
TD24_VG_Disk_Practical
TD24_VG_Disk_Practical for long run
To be determined reflecting the status
KT-1
Nextef