High field pulsed microwiggler comprising a conductive tube with periodically space slots

Patent · Tue Dec 31 23:00:00 EST 1991

OSTI ID:868455

Warren, Roger W ^[1]

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1. Santa Fe, NM

A microwiggler assembly produces large magnetic fields for oscillating ched particle beams, particularly electron beams for free electron laser (FEL) application. A tube of electrically conductive material is formed with radial slots axially spaced at the period of the electron beam. The slots have alternate 180.degree. relationships and are formed to a maximum depth of 0.6 to 0.7 times the tube circumference. An optimum slot depth is selected to eliminate magnetic quadrupole fields within the microwiggler as determined from a conventional pulsed wire technique. Suitable slot configurations include single slits, double slits, triple slits, and elliptical slots. An axial electron beam direction is maintained by experimentally placing end slits adjacent entrance and exit portions of the assembly, where the end slit depth is determined by use of the pulsed wire technique outside the tube.

• Research Organization: Los Alamos National Laboratory (LANL), Los Alamos, NM
• DOE Contract Number: W-7405-ENG-36
• Assignee: United State of America as represented by Department of Energy (Washington, DC)
• Patent Number(s): US 5144193
• OSTI ID: 868455
• Country of Publication: United States
• Language: English

Related Subjects

/315/372/
180
adjacent
alternate
application
assembly
axial
axially
axially spaced
beam
beam direction
beams
ched
ched particle
circumference
comprising
conductive
conductive material
conductive tube
configurations
conventional
degree
depth
determined
direction
double
electrically
electrically conductive
electron
electron beam
electron beams
electron laser
eliminate
elliptical
entrance
exit
experimentally
field
field pulse
fields
formed
free
free electron
laser
magnetic
magnetic field
magnetic fields
maintained
material
maximum
microwiggler
optimum
oscillating
outside
particle
particle beam
particle beams
particularly
particularly electron
period
periodically
periodically space
placing
portions
produces
pulsed
quadrupole
quadrupole field
radial
radial slots
relationships
selected
single
slit
slits
slot
slot configuration
slots
space
spaced
suitable
technique
times
triple
tube
wire