LGS diagnostics LGS diagnostics

Results (so far)Results (so far)

Anna Moore, Hal PetrieAnna Moore, Hal Petrie

LGS facility meetingLGS facility meeting3030thth Jan 2007 Jan 2007

Set-up

• COUDE– Photodiode

• Average power• Macro pulse profile

– Near field image (pupil)

– Far field image (spot)

– Collimation• Shear plate (Jenny’s)

• PRIME FOCUS– Photodiode

• Average power• Macro pulse profile

– Near field image (pupil)

– Far field image (spot)

– Wavefront map• Shack-Hartmann sensor

Power

PRIME

COUDE

~400Hz~4.7W

Power

PRIME

COUDE

Power

PRIME

COUDE

100kHz sampling max

Far field Image

660nm HeNe laser7th Jan 2007PRIME FOCUS

Fl=1000mmFor ½ inch beam size FWHM of spot = 64m

570 pixels (8.4m/pix)02:56

Near Field Image

660nm HeNe laser7th Jan 2007PRIME FOCUS

CCD is conjugated topick-off wedge

570 pixels (~4in, need to check*)02:58

Far field Image

589nm laser7th Jan 2007PRIME FOCUS

Fl=1000mmFor ½ inch beam size FWHM of spot = 64m

01:18

Far field Image

589nm laser7th Jan 2007PRIME FOCUS

Fl=1000mmFor ½ inch beam size FWHM of spot = 64m

01:25

Far field Image

589nm laser7th Jan 2007PRIME FOCUS

Fl=1000mmFor ½ inch beam size FWHM of spot = 64m

02:04

Far field Image

589nm laser7th Jan 2007PRIME FOCUS

Fl=1000mmFor ½ inch beam size FWHM of spot = 64m

02:24

Near Field Image

589nm laser7th Jan 2007PRIME FOCUS

CCD is conjugated topick-off wedge

570 pixels (~4in, need to check*)02:00