Design of a cryo-cooled artificial channel-cut crystal ... · Pulse-tube Cryo-cooler Based on He-gas Optical Alignment port . MEDSI 2014 Melbourne Dong,Xiaohao etc. 21/10/2014 Cryo-Cooling

(#)

Xiaohao Dong a), Deming Shu b), Harald Sinn a)

a) European XFEL GmbH, Hamburg, D-22761, Germany

b) Argonne National Laboratory, Argonne, IL 60439, U.S.A

Design of a cryo-cooled artificial

channel-cut crystal monochromator

for European XFEL

Mechanical Engineering Design of Synchrotron Radiation Equipment and

Instrumentation 2014, 20th - 24th October 2014, Melbourne

MEDSI 2014 Melbourne Dong,Xiaohao etc. 21/10/2014

Outline 2

1) Introduction

2) Mechanical design

3) Cryogenic cooling

4) 4-bounce configuration

5) Integration into beamlines


Introduction: beamline concept 3

TDR 2012.9 WP73: X-Ray optics & beam transport (update 2014.2)

2 or 4-bounce

2-bounce

4-bounce

900 950 (m) 200 250 350

3-25 keV

(0.4-0.05 nm)

TDR European XFEL, 2006

Tunnel-end


Introduction: Si-mono. concept 4

High quality polishing

surface-Minimizing

wavefront distortions

Enhanced stability-

Minimizing vibrations

due to a long beam

transport line

Artificial Channel-cut type

CDR WP73, 2011

Dash line = 100K

Solid line = 300K

Both crystals are cryogenically cooled—

Connecting directly to the cold plate:

to minimize deviation (angle variation)

Transmitted pulses at

100K 5x more than

the ones at 300K


Artificial Channel-Cut mechanism (2-bounce) 5

Si(111) & Si(220): 60x28(25)x12 mm; E/E = 10-4

Si(311) & Si(511) compatible


Manufactured prototype (May 2014) 6

PEEK

PEEK

By A.J.R. Industries, Inc.


Mono. overall design 7

rotation shaft

with 3- set ceramic bearings

Sine-bar driver

Assembly window

ACCM mechanism

Pulse-tube Cryo-cooler

Based on He-gas

Optical

Alignment port


Cryo-Cooling test set up 8

G.Galasso, A.Kukla (2010)


Steady thermal behavior (Cryo-cooler test) 9

G.Galasso, T.Molaro (2011) G.Galasso, T.Molaro (2011)


4-Bounce configuration 10


Artificial Channel-Cut mechanism (4-bounce) 11

Mirrored configuration


Support tables 12

One single table Individual table

manual

adjustment

device

motorized

movements


Integration into beamlines 13

XTD9 tunnel

“Space in the

instruments hall is

much more

expensive…”

- A beamline Scientist

N. Kohlstrunk


Acknowledgements 14

Many thanks

to G.Galasso,etc. for feasibility studies of the cooling performance of the pulse-tube

cooler…

to all the related colleagues in our group and European XFEL for this in-house

project…

to S.Narayanan & W.Yang at APS, and V.Srinivasan at LCLS, etc., for feedback and

discussion…

to the arrangement of the work for others agreement No.857Y2 between Uchichago

Argonne LLC and European XFEL. Work at Argonne is supported by the U.S.

Department of Energy, Office of Science, under Contract No. DE-AC02-06CH11357.

Documents

Design of a cryo-cooled artificial channel-cut crystal ... · Pulse-tube Cryo-cooler Based on He-gas Optical Alignment port . MEDSI 2014 Melbourne Dong,Xiaohao etc. 21/10/2014 Cryo-Cooling