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G - L i n e O p t i c s a n d G 1 H u t c h

G - L i n e O p t i c s a n d G 1 H u t c h. Raphaël H Kapfer Cornell University, 24th May 2001 with help from: Marcus Collins & Detlef Smilgies. 1- Geometric (Ray) Optics (Quick summary). 1 = 1 + 1 f p q. Magic Formula:. p. z. o. z. i. M = z / z. Magnification:.

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G - L i n e O p t i c s a n d G 1 H u t c h

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  1. G-Line Optics and G1 Hutch Raphaël H Kapfer Cornell University, 24th May 2001 with help from: Marcus Collins & Detlef Smilgies

  2. 1- Geometric (Ray) Optics (Quick summary) 1 = 1 + 1 f p q Magic Formula: p z o z i M = z / z Magnification: i o q M = q / p TASK • Focusing an x-ray beam from the 50-Pole Wiggler on the detector (or sample) in the G1 Hutch.

  3. 2- General Upstream Optics (G1 only) Sagitally bent multilayer or Si Mono (ML2) Meridionally bent Mirror (Mi2) ΔE/E = 1% (multilayers) Smaller with Si Mono X-rays 50-Pole Wiggler • H focusing • V focusing • Harmonic reduction Meridionally bent Mirror (Mi1) Multilayer or Si Mono (ML1) • V focusing • Heat load • Harmonic reduction

  4. 3- Upstream Optics (Details) Mi2 ML2 ML1 Mi1 ~1/γ γ = 104 so opening angle is 0.1mrad Note: Source on the left

  5. 4- Upstream Optics (Details) • ML1T has fixed position • ML2T moves in order to keep the incoming beam on Mi2T the same. Region accessible to ML2T Notes: Incoming beam from the right, not to scale (ML1T = multilayer 1 for G1), (ML2T = multilayer 2 for G1), (Mi2T = mirror 2 for G1).

  6. 5- Numbers Multilayer d spacing: 27 Å Energy: 8-15 keV (10keV for typical numbers: Bragg angle of 23.27 mrad (1.33deg)). Mi1 at 24.3 meters from source. Incident angle is 4 mrad ML1 at 27 meters and up 21.6mm (also beamsplitter), ML2 at 29.448 meters up 155.3mm for 10 keV Mi2 at 32.5 meters from source, 179.7mm up. With this configuration, focal spot (horizontal) is at 38.4m from the source in G1 hutch The beam goes from 1.65mm by 0.85mm to 0.5mm by 0.206mm along the optics. Demagnification of 3.3 in the horizontal and 4.1 in the vertical. From 8 keV to 15 keV the position of the multilayer varies from 28.96m to 30.67m along the beam and from 151.3mm to 165.1mm in height V position (mm) H position in meters

  7. 6- G1 Layout • Focal spot 1.5m away from back wall at 10 keV (38.4 meters away from source) • The focus is subject to a 1m/keV change due to sagitally bent multilayer G2 1.32m G1 4.53m 4.57m 50 Pole wiggler 1.07m

  8. 7- G1 Layout (Beam Separation) Size of the beam at focal spot: Horizontal: 0.5mm Vertical: 0.2mm The beampipe for G2/3 cannot be used as support for the G1 beamline Rail support on each side? Notes: All numbers in mm, downstream view

  9. 8- G1 Hutch (Details) • Detector on rails (and cooling + garage door) • Vacuum + possibility of slits (SAX) • Sample Chamber on rails (controlled environment, cooler (neslab), vacuum pump, x-z sample stage) • Side Bounce Mirror (asymetrically cut) Possible Trajectory for 2 color experiment • 3 sets of motorized x-z slits + ionization chambers (vacuum compatible or He flow) on rails Other equipment: Temperature control system: Peltier and N Cold Flow Rotation stage, macromolecular/SAX/GISAX stuff, etc. Notes: Not to scale, focus spot should be on the detector.

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