ICAP-2002 Abstracts and Posters

ICAP 2002 Abstracts and Posters

Simulation Issues for RF Photoinjectors

Abstract

Accurate simulation of radiofrequency photoinjector performance remains a challenge in predicting the performance of future linear colliders and next-generation light sources. Calculated performance consistently and significantly exceeds measured performance. This discrepancy can be traced to two principal sources: measurement uncertainty and unrealistic assumptions and approximations made in the numerical calculations. The dynamics involved make the calculation challenging: electrons are accelerated from rest to relativistic velocities in millimeters. Strong wakefield and space charge effects require that fields be accurately represented on very small distance scales over large volumes. These issues will be discussed, the results of detailed code-to-code comparisons for tracking and particle-in-cell codes will be shown, and recommendations for further tests and improvements will be made.

E. Colby, V. Ivanov, Z. Li, C. Limborg, SLAC

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