Calculation of The Lifetimes of Thin Stripper Targets Under Bombardment of Intense Pulsed Ions

TL;DR

This paper models the lifetimes of thin stripper targets under intense pulsed ion bombardment, considering radiation damage and evaporation mechanisms, and applies it to conditions in BNL linac and SNS.

Contribution

It introduces a simple model combining radiation damage and evaporation to predict stripper foil lifetimes under pulsed ion beams.

Findings

Radiation damage dominates below 2500K.

Evaporation mechanism prevails above 2500K.

Model successfully describes stripper foil behavior in specific accelerator conditions.

Abstract

The problems of stripper target behavior in the nonstationary intense particle beams are considered. The historical sketch of studying of radiation damage failure of carbon targets under ion bombardment is presented. The simple model of evaporation of a target by an intensive pulsing beam is supposed. Stripper foils lifetimes in the nonstationary intense particle can be described by two failure mechanisms: radiation damage accumulation and evaporation of target. At the maximal temperatures less than 2500K the radiation damage are dominated; at temperatures above 2500K the mechanism of evaporation of a foil prevails. The proposed approach has been applied to the discription of behaviour of stripper foils in the BNL linac and SNS conditions.