compressor

Helium filled

Helium filledoptional

equivalent plane imaging

laser beam dump

hole in mirrorfor e-beam

SSA and more

Vacuum box for optics

• Due to the uncertain tuning requirements of the optics we cannot rely on the placing of individual small vacuum cubes for locating optics. Enough flexibility can only be assured by use of a single large vacuum box enclosing all the mirrors, lenses, apertures, masks and axicon.

Optics locations

• Axicon to plasma entrance 40-50 cm• Lens to axicon 40-60 cm (if needed)

Pulse distortion

• Helium in transport line will not causesignificant distortion

• Transmitting optics cause spatial temporal distortion

compressor windowlensaxicon

• How to make all reflective?

Laser Parts List

• 10 TW laser• single shot auto-correlator• online energy meter• spectrometer• Variable delay arm (upstairs)• equivalent plane profile monitor

Timing

• How to monitor e-beam laser timing on sub psec scale?

• variable delay arm (upstairs)

Laser E-beam Overlap

• robust insertable targets• cameras

Optics and mounts

• 3” mirrors + mounts• 3” mirror with hole + mount (x, y tip, tilt)• 3” lenses• axicon (x, y tip, tilt)• apertures and masks (x,y)• telescopic beam reducer• vacuum compatible motorized mounts

Axicon Length Control

Initially the center intensity drops as those rays that make lower z portion of focus are blocked. After about 60 cm, I/I0 is recoveredTheory indicates that the center 3.5 mm spot contributes to 40 cm of focal length.

Apertures and stops can be used to control the ionization length

The 1” diameter 0.5 deg was used