Experimental results of a high-gain microwave FEL operating at 140 GHz

Conference · Thu Nov 12 00:00:00 EST 1987

OSTI ID:5525578

Throop, A L; Fawley, W M; Jong, R A; Orzechowski, T J; Prosnitz, D; Scharlemann, E T; Stever, R D; Westenskow, G A; Hopkins, D B; Sessler, A M

The Electron Laser Facility (ELF) at LLNL has been used to generate high peak-powers at 140 GHz, extending the operating range of the device from previous experiments at 35 GHz. With 30 watts of input signal, an exponential gain of 21 dB/m and a saturated output power of over 50 MW were measured. Numerical tapering studies indicate that space charge effects were sufficiently large to affect trapping efficiency. Broadband spontaneous emission was observed over a wide range of wiggler fields at frequencies corresponding to FEL resonance. Over 150 MW of spontaneous power was measured near 94 GHz. The results are in good agreement with particle simulation codes. 4 refs., 9 figs.

• Research Organization: Lawrence Livermore National Lab., CA (USA); Lawrence Berkeley Lab., CA (USA); Massachusetts Inst. of Tech., Cambridge (USA). Plasma Fusion Center
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 5525578
• Report Number(s): UCRL-97706; CONF-8709110-17; ON: DE88004358
• Resource Relation: Conference: 9. international free-electron laser conference, Williamsburg, VA, USA, 14 Sep 1987; Other Information: Portions of this document are illegible in microfiche products
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
FREE ELECTRON LASERS
OPERATION
COMPUTERIZED SIMULATION
GHZ RANGE 100-1000
MAGNETIC FIELDS
MICROWAVE RADIATION
SPACE CHARGE
TRAPPED ELECTRONS
WIGGLER MAGNETS
ELECTRICAL EQUIPMENT
ELECTROMAGNETIC RADIATION
ELECTROMAGNETS
ELECTRONS
ELEMENTARY PARTICLES
EQUIPMENT
FERMIONS
FREQUENCY RANGE
GHZ RANGE
LASERS
LEPTONS
MAGNETS
RADIATIONS
SIMULATION
420300* - Engineering- Lasers- (-1989)