design studies of an x band multi beam klystron n.
Download
Skip this Video
Loading SlideShow in 5 Seconds..
Design Studies of an X-band Multi-beam Klystron PowerPoint Presentation
Download Presentation
Design Studies of an X-band Multi-beam Klystron

Loading in 2 Seconds...

play fullscreen
1 / 15

Design Studies of an X-band Multi-beam Klystron - PowerPoint PPT Presentation


  • 116 Views
  • Uploaded on

Accelerator Laboratory, KEK. Design Studies of an X-band Multi-beam Klystron. S. Fukuda KEK. Accelerator Laboratory, KEK. Motivation to develop x-band MBK.

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'Design Studies of an X-band Multi-beam Klystron' - mort


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
design studies of an x band multi beam klystron

Accelerator Laboratory, KEK

Design Studies of an X-band Multi-beam Klystron

S. Fukuda

KEK

US High Gradient Research Collaboration Workshop

motivation to develop x band mbk

Accelerator Laboratory, KEK

Motivation to develop x-band MBK
  • X-band compact linac are desired for the medical use and non-destructive inspection; ex. Cyber-knife machine, handy X-ray inspection for chemical plant.
  • We have developed the compact linac of 900keV collaborating between KEK and Tokyo university. RF source was a commercial magnetron.
  • It is desired to develop a mbk for the next stage.
  • If we are succeeded in obtaining the competitive budget, we want to develop an X-band mbk.

US High Gradient Research Collaboration Workshop

achieving goal of mbk design

Accelerator Laboratory, KEK

Achieving goal of MBK design
  • Lower applied voltage not to use the insulation oil or to use a small insulation oil cup.
  • Output Power (1) Output power of 2 MW.

(2) Output power of a10 MW or more.

  • Two approach:

(1) usual multi-gun assemblies for MBK and

(2) magnetic compression gun for MBK (more high power version).

  • Designs were performed by Russians of BINP: Dr. Vladimir Teryaev and Dr. Alexsander Larionov at KEK .

US High Gradient Research Collaboration Workshop

project and parameters 1

Accelerator Laboratory, KEK

Project and Parameters (1)
  • Required parameters:
  • Vbeam =50kV
  • Prf out =2MW
  • P rf in < 50W
  • Loading of the cathode should be no more than 7A/cm2

US High Gradient Research Collaboration Workshop

parameters 2

Accelerator Laboratory, KEK

Parameters (2)

US High Gradient Research Collaboration Workshop

sketch of whole mbk

Accelerator Laboratory, KEK

Sketch of whole MBK

US High Gradient Research Collaboration Workshop

gun simulation

Accelerator Laboratory, KEK

Gun Simulation

Bz=2.5kG, Bz/Bb=2

Focusing by 2-lenses

compensation of transverse

Field, less than 0.005Bz

Magnetic field is a key point.

Micro-perv. of a beam-let=1.25

Current of a beam-let=14A

US High Gradient Research Collaboration Workshop

cavity simulation

Accelerator Laboratory, KEK

Cavity simulation

TM410 Mode is used.

6 cavities system

US High Gradient Research Collaboration Workshop

electromagnet design

Accelerator Laboratory, KEK

Electromagnet Design

US High Gradient Research Collaboration Workshop

design difficulties and drawback

Accelerator Laboratory, KEK

Design Difficulties and Drawback
  • Hot dimension of the cathode
  • Different expansion factors between copper and iron for magnetic lens
  • High perveance of 10 microperv. can lead the instability, and beam tester is required.
  • Collector is also possible source of instability and model test is required.
  • Drawback: low efficiency of 40% due to a high microperv of a beam-let.

US High Gradient Research Collaboration Workshop

more high power version larionov s approach magnetically compression for mbk

Accelerator Laboratory, KEK

More high power version: Larionov’s approachMagnetically compression for MBK

More larger cathodes are possibly used.

( more beam intensity)

Number of the cathodes (i.e. beamlets)

are possibly used.

US High Gradient Research Collaboration Workshop

slide13

Accelerator Laboratory, KEK

US High Gradient Research Collaboration Workshop

slide14

Accelerator Laboratory, KEK

10.3MW

10.1MW

9.8MW

US High Gradient Research Collaboration Workshop

summary

Accelerator Laboratory, KEK

Summary
  • X-band mbk is desired for an application of a compact linac such as medical use and non-destructive inspection use.
  • Design attempts of X-band mbk in KEK are shown.
  • Features of low applied voltage to the klystron around 50-60kV are achieving goal of these designs.

US High Gradient Research Collaboration Workshop