1 / 13

Side Coupled Linac Design at CERN M. Pasini, Abingdon September 28 th , 2005

Side Coupled Linac Design at CERN M. Pasini, Abingdon September 28 th , 2005. CONTENTS:. SCL structure Beam Parameters SCL Layout RF studies Frequency error study Conclusions. SCL Principles. Why SCL?.

zinnia
Download Presentation

Side Coupled Linac Design at CERN M. Pasini, Abingdon September 28 th , 2005

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. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Side Coupled Linac Design at CERNM. Pasini, Abingdon September 28th, 2005 1

  2. CONTENTS: • SCL structure • Beam Parameters • SCL Layout • RF studies • Frequency error study • Conclusions 2

  3. SCL Principles 3

  4. Why SCL? • Above 90 MeV the effective Shunt Impedance of the SCL is bigger then the one of the CCDTL. • Compared to on-axis coupled structure (OCS) and/or annular-ring-coupled structure (ACS) the SCL offers a good mode separation in the coupling cell and simple and well established tuning procedure. • SCL cells can be easily machined on a lathe (using a circular frame) with tolerance within 0.05 mm in the nose cone region. • Alternative production technologies like Electrical Discharge Machining (EDM) (investigated by INFN-Naples) might reduce production costs. 4

  5. ZT2 Curve CCDTL DTL tank2 SCL DTL tank3 DTL tank1 5

  6. Beam Parameters 6

  7. SCL Layout design program 7

  8. SCL Layout design program 8

  9. SCL Layout 9

  10. RF Studies with MWS Coupling and Shunt impedance study as a function of the intersection length Geometric shapes of the coupling slot and hence coupling factors are well defined because each slot is re-machined 10

  11. PSPICE Simulation ±50 kHz error only on the accelerating cells ±50 kHz error on the accelerating and coupling cells For a complete module of 5 tanks we expect a maximum error of ± 0.9% for the field level 11

  12. 704 MHz Klystrons Contacts with 2 manufacturers : Thales – 4 MW single beam klystron Toshiba – 5 MW multiple beam klystron • Max pulse length = 2ms • Rep rate = 50 Hz • RF duty factor = 10 % 12

  13. Summary / Conclusions • A layout of the SCL section is completed. • The new Excel tool allows to design SCL with a variety of free parameters. • Coupling coefficients of 3% guarantees low field error (with 50 kHz tuning accuracy) with minimum reduction in Q-value. • Design for 2 klystrons meeting our specs are existing. 13

More Related