April 14, 1999 VLS-PGM

(1)

April 14, 1999 VLS-PGM

SSY E B

9/63*0

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P. Bressler BESSY I E.020 82004-167 82004-149 bressler@bessy.de

M.Mast BESSY I E.018 82004-151 82004-149 mast@bessy.de

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35(/,0,1$5<7,0(6&+('8/(

start of commissioning start of user operation

August 1998 October 1998

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237,&$//$<287VFKHPDWLF

SSY E B

12950

13150 200

14150 14364 15360 +- 500 bendable

1000 214 996+ -500

ES

174°

VLS-PGM

top view

side view

M

₁

G M

₂

horizontal focus wall

plane grating 1000 l/mm

exit slit

12950 0

distance between elements [mm]

distance to source point [mm]

ellipsoidal mirror

acceptance 0.33mrad (hor.) , 0.02 - 0.04 mrad (vert.)

monochromator principle:

˝

varied line spacing plane grating monochromator optical components:

M1 : spherical mirror, vertical deflection, 2Θ=174°, nickel coated, water cooled, vertical demagnification (10:1) of source on exit slit G1 : plane grating, vertical deflection, 2Θ= 174 °, gold coated, varied line spacing d₀=1000 l/mm

E [eV] d[1/mm] R [mm] coating

(2)

April 14, 1999 VLS-PGM

SSY E B

9/63*0

˝

G1 270 - 700 970 - 1030

˝ (± 3%)

∞ Au

M3: bendable mirror (planar to plane elliptical), horizontal deflection,

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2Θ= 174° (variable 168°- 180°), bendable radius 75m - ∞, nickel coated,

˝

horizontal demagnification of source on sample : exit slit rectangular, continuously adjustable : 0-400 µm

references [1] P.R.Bressler, F.Senf, W.Peatman, J.Underwood, M.Koike, P.Batson, P.Denham, BESSY Jahresbericht 1997, 500

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[2] M.Hettrick, J.H. Underwood, P.Batson, M.J. Ekhard, Applied Optics (1988) 200

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(3)

April 14, 1999 VLS-PGM

SSY E B

9/63*0

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plan view

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experimental area ±1m (laterally to beam), 3m behind last valve (see floor plan)

last valve DN 38CF window valve

horizontal focus position vertically divergent beyond exit slit, horizontally adjustable from 200mm to 1200 mm behind the last valve

focus height above floor 1421 mm beam orientation horizontal

(4)

April 14, 1999 VLS-PGM

SSY E B

9/63*0

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9$&8805(48,5(0(176

max. pressure <5 x 10^-8 mbar at last valve, live zero point signal for interlock oil free vacuum system yes

quadrupole mass analyser for gaseous samples required

yes

,1)5$6758&785($7(;3(5,0(17$/67$7,21

electrical power supplies 220V, 380 V max 135 kVA

cooling water 30° / 40°, 10 bar / 2bar

pressurized air 8 bar

oilfree exhaust line not for poisoneous gases!

exhaust line for poisoneous gases in preparation He-recycling system not yet installed

computer network yes

'$7$$48,6,7,21

control system: PC-based control system

data-aquisition computer Personal Computer, measurement bus-extention, OS/2-operating system

data-aquisition software EMP II

remote-control V24-serial port, AMC-protocol

˝

CAN-bus, CAN-protocol (in preparation)