The effects of linear-accelerator noise on the Los Alamos free-electron laser

Journal Article · Mon Jul 01 00:00:00 EDT 1985 · IEEE J. Quant. Electron.; (United States)

DOI:https://doi.org/10.1109/JQE.1985.1072759· OSTI ID:5971959

Lynch, M T; Tallerico, P J; Warren, R W

The optical power produced by the Los Alamos free-electron laser has been flawed by a peristent instability. This instability appears as fluctuations in output power in a frequency band centered around 100 kHz. We have found that the fluctuations are dependent on the strength of the lasing and on variations in the electron micropulse's arrival time. When the lasing is strong, the fluctuations are small; when the lasing is weak, the fluctuations are large. The variations in the electron micropulse's arrival time primarily are due to fluctuations in the accelerator gradients. The primary noise sources in the accelerator are the electron gun and the klystron amplifier chain. In addition, this noise is uncontrolled because of a lack of bandwidth in the feedback controls for the RF system. Appropriate improvements are being made to eliminate these fluctuations in optical power.

• Research Organization: Los Alamos National Laboratory, Los Alamos, NM
• OSTI ID: 5971959
• Journal Information: IEEE J. Quant. Electron.; (United States), Vol. QE-21:7
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
FREE ELECTRON LASERS
BEAM OPTICS
INSTABILITY
SYSTEMS ANALYSIS
LINEAR ACCELERATORS
NOISE
ELECTRON BEAM PUMPING
ELECTRON BEAMS
ELECTRON GUNS
FLUCTUATIONS
FREQUENCY DEPENDENCE
KHZ RANGE 01-100
KLYSTRONS
LASL
RF SYSTEMS
TIME DEPENDENCE
ACCELERATORS
BEAMS
ELECTRICAL PUMPING
ELECTRON TUBES
ELECTRONIC EQUIPMENT
EQUIPMENT
FREQUENCY RANGE
KHZ RANGE
LASERS
LEPTON BEAMS
MICROWAVE EQUIPMENT
MICROWAVE TUBES
NATIONAL ORGANIZATIONS
PARTICLE BEAMS
PUMPING
US AEC
US DOE
US ERDA
US ORGANIZATIONS
VARIATIONS
420300* - Engineering- Lasers- (-1989)