Second RF-Gun beamline

Presentation on theme: "Second RF-Gun beamline"— Presentation transcript:

1 Second RF-Gun beamline
16/06/10 RF gun workshop Second RF-Gun beamline Takuya Natsui

2 Conditioning station

3 6-1 Conditioning station
RF wad input to cathode side cavities

4 Choke mode cathode Breakdown at cathode rod is one of the problem.
New gun will be choke structure. Dummy cathode rod is used. No cathode, all copper.

5 Conditioning result KL_61 Es 34.6kV 繰り返し 5pps (RF) 25pps (HV) RF パルス幅 1.43μs KLY Pf 16.6MW KLY Pb 1.1MW VSWR 1.77 RF-Gun Pf 10.1MW RF-Gun Pb 3.22MW チラー温度 51.0℃ Ch1(青):KLY Pf(VSWR メーター) Ch2(水色):KLY Pb (VSWR メーター) Ch1(青):KLY HV 波形、Ch2(水色):RF-Gun Pf Ch3(赤):RF-Gun Pb、 Ch4(緑):KLY Pin ・RF 立ち上がり部の反射を減らすため、HV タイミングを調整して RF 波形をなまらせている。 ・KLY Pf、Pb、VSWR は、VSWR メーターの値。 ・RF-Gun Pf:10.1MW は、RF-Gun Pf 波形の立下り手前辺りをパワーメーターで測定した値。 ・RF-Gun Pb:3.22MW は、RF-Gun Pb 波形の中央付近をパワーメーターで測定した値。 10 MW input was achieved in 2 weeks conditioning term.

6 CDS RF gun

7 Simple cavity RF gun is developed for test
Cut Disk Structure (CDS)

8 Acceleration cavity This cavity is also annual coupling.
GHz 　　 GHz GHz k = 0.127

9 Reduce multipactoring choke structure design
weak field good vacuum conduction ABS E ABS B

10 This gun is able to test with 60 deg or 0 deg laser injection
Cathode diameter is 6 mm Aperture is 8 mm

11 In the simulation, 5 nC beam generation is possible

12

13

14

15 Additional beam line for CDS RF gun

16 New beam line plan QTW RF gun 0 deg injection CDS RF gun

17 Beam line simulation Gun Q magnet 45 deg Bend

18 Beam line simulation Achromatic beam line Gun Q magnet 45 deg Bend

19 Conclusion The availability of the choke mode RF cut was confirmed in 6-1 conditioning station. New CDS RF gun fabrication and beam line design are ongoing. CDS RF gun has 60 or 0 degree laser injection ports. The 0 degree injection operation is checked in new beam line.

20

21 RegularCellA GN-P006a RegularCellB GN-P007a CouplerCell GN-P008a chokeCell2 GN-P001a endCell GN-P003a 2ndCavity GN-P005a CathodeCell GN-P004a chokeCell1 GN-P002a

22 モードコンバータ

23