Laser Induced Bunch Lengthening on the ACO Storage Ring FEL,

Robinson, Kem Edward; Deacon, David A. G.; Velghe, Michel F.; Madey, John M.

Laser Induced Bunch Lengthening on the ACO Storage Ring FEL,

Active / Technical Report | Accession Number: ADA124552 |

Open PDF

Abstract:

Laser induced bunch lengthening has been measured on the ACO storage ring FEL. The experimental data at low current generally confirms the existing theoretical models, while the high current data is dominated by anomalous effects. As part of the LUREStanford Free Electron Laser Project at Orsay, France, we have developed a sensitive method to measure the laser induced change in the electron bunch length. This method is capable of measuring the absolute bunch with a precision of 1, and fractional changes in electron bunch length as small as 1 part in 100,000. Using this system, we have measured the steady state and time dependent laser induced bunch lengthening as a function of electron current, external laser intensity, RF cavity voltage, the undulator magnetic field, and the detection frequency.

Author(s):

Robinson, Kem Edward ; Deacon, David A. G. ; Velghe, Michel F. ; Madey, John M.

Author Organization(s):

STANFORD UNIV CA HIGH ENERGY PHYSICS LAB

Pagination:

0012

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:

Approved For Public Release

RECORD

Collection: TR

Identifying Numbers

Report Number(s):

HEPL-910, AFOSR-TR-84-0100

Contract/Grant Number(s):

F49620-80-C-0068

Monitor Series:

TR-84-0100

Subject Terms

Joint Capability Areas:

JCA_1.2.3_Educating; JCA_1.3.2_Personnel Management

Modernization Areas:

Directed Energy

Communities of Interest:

Advanced Electronics

Descriptor(s):

*LASER BEAMS, *ELECTRON BEAMS, *STORAGE, *RINGS, *ELECTRICAL LASERS, FUNCTIONS, ANOMALIES, STEADY STATE, EXPERIMENTAL DATA, DETECTION, TIME DEPENDENCE, MODELS, THEORY, ENERGY, INTENSITY, VOLTAGE, CAVITIES, FREE ELECTRONS, LASERS, SENSITIVITY, ELECTRONS, LENGTH, GAIN, FRANCE, EXTERNAL, ELECTRIC CURRENT, RADIOFREQUENCY

Field(s)/Group(s):

Lasers and Masers, Particle Accelerators

Keyword(s):

Storage rings, Bunch lengthening, FEL(Free Electron Lasers), Undulator gaps, Currents(High), Precision

Report Date:

1982 Sep 01