EXPERIMENTAL STATION 5-2

RESPONSIBLE STAFF:	Dan Brehmer, Hal Tompkins (technical support) Jan Lüning, Piero Pianetta (scientific support)
EXPERIMENTS:	Photoemission; NEXAFS; Circular Polarization
% TIME GENERAL USE:	50%
SCHEDULING:	Proposal Submittal and Scheduling Procedures Current SPEAR and Beam Line Schedules
SOURCE:	Multiundulator ID Station
OPTICS:	Elliptical SiC° Incidence Angle
MONOCHROMATOR:	Rowland circle with variable slits, 4 interchangeable gratings
GRATING ANGLE/ ROWLAND CIRCLE DIAMETER GRATING GROOVE DENSITY OPTIMIZED OVER RANGE (eV) RESOLUTION (eV) FLUX (photons/sec) @100mA & 3 GeV 2°/10m 1200 l/mm 250-1500 .07-1.0 .72-1.2x1011 4°/5m 1200 l/mm 90-450 .015-.35 .6-1.8x1011 10°/2m 600 l/mm 30-15 .01-.2 .75-3.0x1012 20°/1m 600 l/mm 10-50 .05-.01 1.5x1012
SPOT SIZE :	50% flux into 1mm circle 90% flux into 2mm circle Note: spot size AT 3.5m from 4° refocusing mirror
INSTRUMENTATION:	Computer: Digital AlphaStation 500/266 w/21" monitor CAMAC Crate with LSI 11: hex scaler, real time clock, D/A converter E500 stepping motor controllers NIM Electronics: voltage to frequency converter (2 channels) Ratemeter amplifier-discriminator I0 Electronics and flux monitor supplied by user keithley 427 available Other: Elliptically Polarizing Undulator, NEXAFS Chamber

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Last Updated:	07 JAN 2003
Content Owner:	Hal Tompkins
Page Editor:	Lisa Dunn