shanghai synchrotron radiation facility ssrf first group of ssrf beamlines xu hongjie sep. 25, 2001...

Shanghai Synchrotron Radiation Facility SSRF

First Group of SSRF Beamlines

Xu Hongjie Sep. 25, 2001 Shanghai


Short story

In April, 1995, the CAS and SMG agreed in principle to make joint efforts for a proposal to construct the SSRF in Shanghai.

In June, 1995, a working group to carry out the feasibility study of the SSRF was set up by the CAS.

In 1995, project team (then called working group) started holding the symposiums to discuss what the users need and which kind of beamline the first group should contain ( over 100 users from about 50 universities, institutes and companies).

1 、 Introduction


Requiements and suggestions

SSRF should be a advanced third generation synchrotron radiation facility.

SSRF should be a user's facility (alignment with user's requirements and needs).

Their shold be enough (?) beamlines meet requirements and needs of users. Beamline allocation models cover the spectrum from FOOB's to PRT/CAT's .


The research lifetime must be longer than 20-30 years after its establishment.

Proposed rules for choosing first group beamlines

Advanced beanline --- tomorrow

Popular beamline --- today

Social impact and industry application


Soliciting the proposals In March, 1996, Working group sent out a ano

uncement to 58 universities and institutes all over China to solicit the proposals of first group beamlines of SSRF.

Announcement (in Chinese). The fifteen beamnlines were proposed as candi

dates (Table 1).Only 5 to 7 beamlines (including 2-3 insertion

devices) will be constructed in the first phase of construction.


Announcement for Soliciting Proposal of Beamlines and Des

ign

March 1996


Proposal Beamlines to users for Soliciti

ng Design

March 1996


By the end of 1997, Around 70 proposal came from more than 20 Universities And Institutes.

The proposals received were concerned with seventeen beamlines.

Distribution of the proposed beamlines


…… Important scientific issuses which require UV radiation have decreased in number compared to those which require hard x-rays ( Birgenau-Shen's Report, 1997).

New tendency: use of coherence/ Micro focus for hard x-ray / Inelastic scattering / Molecular Environment Science (MES) /Infrared---.

Energy of SSRF storage will increase to 3.5 Gev from (2.2 -2.5) GeV in 1998.


Dec.24-25, 1998, a symposium was held to discuss the proposals received, about 130 users who submitted proposals attended the symposium.

Based on the through discussion in the symposium, the Science and Technology Committee (STC) of SSRF chose seven plus one from twenty one beamlines proposed (four more proposals) as the first group beamlines.


Proposed first group beamlines

Macromolecular Crystallography

XAFS

High Resolution Diffraction and Scattering

Medical Application

Hard X-ray Micro focus and Application

Soft X-ray coherent microscopy

LIGA


Proposed substitute beamlines

X-ray scattering

Multi-usage soft X-ray micro-spectroscopy

Photoelectron spectroscopy

Infrared


Review meeting

During June 10 – 17, 1999, the domestic review meeting had been held to review the conceptual design of the first group beamlines of SSRF

Almost all main users of the first group beamlines have been invited and most of them attended the meeting

The advising group, 5 - 7 user experts for each beamline , joint the design and construction of beamline


• International SSRF Beamline CDR Review Meeting

with the participation of 18 experts from the USA, Ja

pan, Germany, France, Italy and Britain had been he

ld during Oct. 21-23, 1999.

• Very positive appraisal on the design of the seven be

amlines as well as many valuable suggestions for app

rovement.

• Further improvement of CDR design in accordance

with these suggestions has been taken.


2. First Group Beamlines


Macromolecular Crystallography Beamline

Scientific applications: Structural determination of macromolecules and their compl

exes like membrane protein, nucleic acid, viruses and drugs etc..

*Time-resolved structural studies of intermediates of biological processes with lifetime down to sub-nanoseconds.

Experimental methods: MAD and related energy-dispersive methods. Single and multiple isomorphous replacement. * White beam Laue diffraction.


Beamline Design :

Source: wiggler, N=20, u=7.5cm, Bmax=1.25T

monochromatic beam:– wavelength range: 0.6–2 – wavelength resolution: ~ 210-4

– focused beam size(FWHM): 0.14 0.2~ 0.20.35mm2 – flux at sample : 1012 ~ 1013 ph/s– focused beam divergence: 1~5mrad (horizontally) 0.1~0.5mrad (vertically)

*white beam:– spectral range: 0.5 –3– focused beam size: 0.20.4mm2 – flux at sample: ~ 1014 ph/s 0.1%bw ~ 1010 ph/bunch


White beam End-station (reserved)

End-station

Slits collimating-mirror monochromator focusing-mirror

Layout of Macromolecular Crystallography beamline


XAFS Beamline

Scientific applications : Provide structural information on a variety of materials, like catal

ysts, metalloproteins, environmental contaminants etc.– Mainly for general purpose XAFS – Possible for other measurements, like diffraction and scattering

XAFS with different detection geometry

– transmission XAFS– Fluorescence XAFS– surface XAFS


Collimating-mirror Monochromator Focused mirror

Experiment station

Layout of XAFS beamline


High Resolution Diffraction and Scattering Beamline

Scientific applications: Crystalline structure of powder samples; The structures of thin films, multi-layer films and one dimen

sional superlattice materials; The structures of surfaces, near surfaces and interfaces; Crystalline structure of small single-crystal molecules; Structural phase transition; The structures and properties of microparticle system and p

orous materials; The structures of catalysts, polymers and biological macrom

olecules; Point defects and defect clusters in solid samples; The structures of amorphous materials, liquid crystals and li

quid metals.


Beamline Design :

Source: bending magnet Energy range: 4~30 keV

Accepttance: 3 mrad(H)0.15 mrad(V) Energy resolution: <2 10-4 (Si(311) monochromator) <4 10-4 (Si(111) monochromator) Focusing spot size:

~0.5(H)0.5(V) mm2, 3.0(H)0.2(V) mrad2

Photon flux at sample position:

>1011 photons/s (Si(111) monochromator)


High Resolution Diffraction and Scattering Beamline layout

12.5m

1

1. Collimating mirror; 2. Sagittally focusing double crystal monochromator; 3. Vertically focusing mirror; 4. Six-circle goniometer; 5. Imaging plate.

1 2 3 4 5


Hard X-Ray Micro Focus Beamline

Scientific Applications:

Providing a X-ray beam in the energy range of 4—40keV for:• Micro x-ray fluorescence (-XRF), permits non-destructive trace-element analysis with micron resolution and sub-ppm sensitivity.• Micro x-ray absorption spectroscopy (-XAS), provides unique chemical information on oxidation state, coordination state, and local environment.• Micro x-ray diffraction (-XRD), permits, for example, structure determinations and the mapping of strain in interconnects on semiconductor chips.• Computed x-ray microtomography (-XCT), can be used for examining the internal microstructure of materials.


Beamline Design:

Bending magnet

Energy range (unfocused): 4—40keV

(focused monochromatic): 4—34keV

energy resolution (E/E): <210-4

Spot size at sample: 1—10 micron, adjustable

Photon flux at sample:

>109photons/(m2s0.1%bw)


Layout of Hard X-Ray Micro Focus Beamline

collimating mirror DCM toroidal mirror

K-B mirrors


Medical Application Beamline

Scientific Applications :

( Aimed at the studies of different sort of medical imaging techniques:)

Intravenous coronary angiography

Other applications as mammography, CT of the brain, micro-beam radiation therapy


Schematic beamline set-up

Source: wiggler, N=10, u=13.6cm, Bmax=1.8T

Key component: Bent Laue crystal monochromator

Flux at patient position: 7 1011 phs/s mm2


Layout of medical application beamline


Soft X-ray Coherent Microscopy Beamline

STXM (Scanning transmission X-ray miroscopy)

XANES (X-ray Absorption Near Edge Structure)

Scientific Applications :

Polymers, Biomaterials, and Soft Matter

Organic Earth Materials

Engineering Polymers

Surfaces and Interfaces

Techniques:


Design Goals:

Wavelength range ： 250~750 eV, cover K edges of C, N, O, F ， L edge of Ca ， L edges of transition element up to Fe

Spatial resolution ： 50~150 nm

Spectral resolution: (E/DE): 3000

Flux output ： 109 (photons/s/0.1%BW)


Optical Set-up for coherent microscopy beamline

Toroidalmirror

Entrance slit


Layout of coherent microscopy beamline

1. CF63 gate valve 2. laser collimating system 3. BPM 4. Water cooled four knife diagram 5.vacuum gear 6. plane mirror 7. -ray collimator 8. vacuum pipe 9. bellow 10.ion pump 11. torroidal mirror 12. water-cooled entrance slit 13. monochromator 14. Exit slit 15. end station


LIGA BeamlineScientific Applications:

To develop the techniques of micro-fabricating for microstructures and micro-parts, such as micro-motor, micro-pump, fiber connector, sensors and gratings etc..

Design goals:

Source: bending magnetAccepting angle horizontal: 4 mrad; vertical: 0.4 mradEnergy range: 1- 8keVSpot size (horizontal): 120 mmScanning range (vertical): 110 mm


距光源防护墙

2. 前置束流位置探测器

20. 长升降台（两台）

13. 后置束流位置探测器

8. 后置镜箱箱体及旋转机构3. 前置水冷四刀狭缝

17. 短升降台 18. 15短支架（个）19. CF150 管道

11. 长波纹组件

6. 前置荧光屏观察系统1. VAT100 阀门（三个）

12. 軔致辐射防护组件

7. 五维镜箱调节支架

22. 4长支架（个）21. 后置四刀狭缝 23. Be 窗

15. 400 穿心式离子泵（三台）

10. 后置荧光屏观察系统5. 钛升华泵（两台）

9. 400 升离子泵（两台）4. 前置镜箱箱体及旋转机构

14. 短波纹组件 16. 差分扁管Layout of LIGA Beamline

Layout of the experimental station


New Requirments from Users

A symposium on using SSRF dedicated to front research area had been held during Dec. 21-23, 2000

Many active scientists attend the symposium, whose topics distribute widely

Life Science, Geometry Science, Nano Science and technology, Medical, Chemical Industry and basic research topics.

First group of beamlines has to been modifying based on the requirements of users.

Computational

Experimental

Tasks: Structural Genomics ProgramTasks: Structural Genomics Program

Genome Analysis & Target Selection

Models, folds, functional Analysis

PDB

Structure Solving

NMR data collection

Beamline data collection

Expression, purification of proteins

Crystallization

上海光源！？


1fsec 1psec 1nsec 1sec 1sec

Quantum dynamics

Molecular dynamics

Langevin

Hopping kinetics, Lattice process

Dynamic TheoreticalMethod

Ultrafast Spectroscopy

Optical,Vibrational

Dielectric, Magnetic ,Mechanical relaxation

Chemical reaction

Measurement


3. R&D of Beamlines

Cooling Monochromator Mirror Bender Components


Front end of Undulator Beamline


BPM of CVD Diamond光束测量分辨率 5m ；光束位置检测误差 <6m ；


Cooling Experimental System功率密度 1.28W/mm2 ；晶面形变量 0.08m


Long Trace Profiler Prototype 扫描范围 0~350mm ；单点稳定性 0.2rad/200s


Sagittal Monochromator 晶体调节精度 0.45 ；聚焦光斑水平弥散 25% ；可承受最大热负载 ~1W/mm2


Water Cooling Slits定位精度 <7m ；重复精度 2m

shanghai synchrotron radiation facility ssrf first group of ssrf beamlines xu hongjie sep. 25, 2001...

Documents

shanghai slide

group beamlines of ssrf

suggestions ssrf

proposed beamlines

proposal of beamlines

introduction slide

uv radiation

users facility alignment