Beam impact studies on ILC collimators

Author

Ellwood, George ; Greenhalgh, Justin

Author_Institution

STFC/RAL, Didcot

fYear

2007

fDate

25-29 June 2007

Firstpage

2859

Lastpage

2861

Abstract

Spoilers in the ILC Beam Delivery System are required to survive without failure a minimum of 1-2 direct impacts from each energetic electron or positron bunch of charged particles, in addition to maintaining low geometric and resistive wall wake fields. The transient shock wave resulting from rapid localised beam heating and its implications for spoiler design are studied using ANSYS. Shockwave propagation is modelled in 2 dimensions showing the effect of dilatational Shockwaves striking free surfaces, producing reflected dilatational and distortional waves. The implication of these reflected waves on the damage of the collimators is also discussed.

Keywords

beam handling techniques; collimators; particle beam bunching; 2-dimensional shockwave propagation; ILC beam delivery system; ILC collimators; beam impact studies; dilatational waves; distortional waves; energetic electron bunch; energetic positron bunch; rapid localised beam heating; resistive wall wake fields; transient shock wave; Collimators; Electron beams; Finite element methods; Heat transfer; Life estimation; Manufacturing; Particle beams; Positrons; Shock waves; Stress;

fLanguage

English

Publisher

ieee

Conference_Titel

Particle Accelerator Conference, 2007. PAC. IEEE

Conference_Location

Albuquerque, NM

Print_ISBN

978-1-4244-0916-7

Type

conf

DOI

10.1109/PAC.2007.4440600

Filename

4440600