Australian Synchrotron

[
Australian Synchrotron schema
1. Electron gun
2. Linear accelerator (linac)
3. Booster ring
4. Storage ring
5. Beamline
6. Endstation (or experimental workstation, i.e., laboratory)]

The Australian Synchrotron is a 3 GeV synchrotron radiation facility built in Melbourne, Australia and opened on 31 July 2007 [ [http://www.synchrotron.vic.gov.au/content.asp?document_id=5076 Official Opening webcast timetable & archive site] , from 0020UTC 31 Jul 07] [ [http://www.abc.net.au/news/stories/2007/07/31/1992421.htm Scientists to unveil monster synchrotron] , ABC News (Australia), 31 July 2007] . It is located on the former site of the Clayton drive-in theatre, on 800 Blackburn Rd, next to the Telstra research laboratories and across the road from the Monash University Clayton Campus.

The Australian Synchrotron is known as a 'Light Source' facility. It uses particle accelerators to produce a beam of high energy electrons which are placed within a Storage ring that circulates the electrons to create synchrotron light. The light is directed down separate beamlines at the end of which may be placed a variety of experimental equipment contained within the endstations.

Accelerator Systems

Electron Gun:
The electrons used to provide the synchrotron light are first produced at the electron gun, by thermionic emission from a heated metal cathode. The emitted electrons are then accelerated to an energy of 90 keV (kilo-electron volts) by a 90 kilovolt potential applied across the gun and make their way into the Linear Accelerator.

Linear Accelerator:
The linear accelerator (or linac) uses a series of RF cavities, operating at a frequency of 3 GHz, to accelerate the electron beam to an energy of 100 MeV, over a distance of around 15 metres. Due to the nature of this acceleration, the beam must be separated into discrete packets, or 'bunches'. This bunching process is done at the start of the linac, using several 'bunching' cavities. The linac can accelerate a beam once every second. Further along the linac quadrupole magnets are used to help focus the electron beam.

Booster Synchrotron:
The booster is an electron synchrotron which takes the 100 MeV beam from the linac and increases its energy to 3 GeV. The booster ring is 130 metres in circumference and contains a single 5-cell RF cavity (operating at 500 MHz) which provides energy to the electron beam. Acceleration of the beam is achieved by a simultaneous ramping up of the magnet strength and cavity fields. Each ramping cycle takes approximately 1 second (for a complete ramp up and down).

Storage Ring:
The storage ring is the final destination for the accelerated electrons. It is 216 metres in circumference and consists of 14 nearly identical sectors. Each sector consists of a straight section and an arc, with the arcs containing 2 dipole 'bending' magnets each. Each dipole magnet is a potential source of synchrotron light and most straight sections can also host an insertion device, giving the possibility of 30+ beamlines at the Australian Synchrotron. Two of the straight sections are used to host the storage ring 500 MHz RF cavities, which are essential for replacing the energy that the beam loses through synchrotron radiation. The storage ring also contains a large number of quadrupole and sextupole magnets used for beam focusing and chromaticity corrections. The ring is designed to hold 200mA of stored current with a beam lifetime of over 20 hours.

Vacuum Systems:
The electron beam is kept within a very high vacuum at all times during the acceleration process and within the storage ring. This vacuum is necessary as any beam collisions with gas molecules will quickly degrade the beam quality and reduce the lifetime of the beam. The vacuum is achieved by enclosing the beam in a stainless steel pipe system, with numerous vacuum pump systems continually working to keep the vacuum quality high. Pressure within the storage ring is typically around 10-10 millibar.

Control System
Each digital and analogue I/O channel is associated with a database entry in a highly-customised distributed database system called EPICS (Experimental Physics and Industrial Control System). The condition of the system is monitored and controlled by connecting specialised GUIs to the specified database entries. Control of the physics-related parameters of the beam is provided through MATLAB which also provides data analysis tools and an interface with a computer model of the accelerator. Personnel and equipment protection is achieved through the use of Programmable logic controller-based systems.

Beamlines and experimental endstations

*Imaging and Medical Therapy
*Infrared Spectroscopy
*Microspectroscopy
*Protein Crystallography
*Powder Diffraction
*Small and Wide Angle Scattering
*Soft X-ray Spectroscopy
*X-ray Absorption Spectroscopy

Funding contributors

* Victorian Government ( [http://www.vic.gov.au Official Site] )
* [http://www.aamri.org/ Association of Australian Medical Research Institutes]
* Australian Nuclear Science and Technology Organisation ( [http://www.ansto.gov.au Official Site] )
* CSIRO ( [http://www.csiro.au Australian Commonwealth Science and Industrial Research Organisation] )
* Monash University ( [http://www.monash.edu.au Official site] )
* New Zealand ( [http://www.govt.nz/ New Zealand Government] )
* Queensland ( [http://www.qld.gov.au Government site] )
* Western Australia ( [http://www.wa.gov.au Government site] )
* Melbourne University ( [http://www.unimelb.edu.au Official site] )
* New South Wales consortium
* South Australia/La Trobe University consortium

See also

*List of synchrotron radiation facilities

References

External links

* [http://www.synchrotron.org.au Australian Synchrotron website]
** [http://www.synchrotron.org.au/content.asp?Document_ID=5021 Facility Status] - updated every minute
* [http://www.lightsources.org Lightsources - website about the world's synchrotrons]
* [http://www.symmetrymagazine.org/cms/?pid=1000325 Deconstruction of Australian Synchrotron in "symmetry" magazine]


Wikimedia Foundation. 2010.

Look at other dictionaries:

  • Synchrotron — Article connexe : rayonnement synchrotron. Le terme synchrotron désigne un grand instrument électromagnétique destiné à l accélération à haute énergie de particules élémentaires. Schéma d un synchrotron à protons vue en plan et section d un… …   Wikipédia en Français

  • Synchrotron — A synchrotron is a particular type of cyclic particle accelerator in which the magnetic field (to turn the particles so they circulate) and the electric field (to accelerate the particles) are carefully synchronized with the travelling particle… …   Wikipedia

  • Australian National University — The Australian National University Coat of Arms of ANU Motto Naturam Primum Cognoscere Rerum ( First to learn the nature of things ) Established 1946 …   Wikipedia

  • List of synchrotron radiation facilities — A list of storage rings and free electron lasers used as synchrotron radiation sources by country. Armenia * Center for the Advancement of Natural Discoveries using Light Emission (CANDLE), Yerevan (proposed) [http://www.candle.am/index.html]… …   Wikipedia

  • Monash Centre for Synchrotron Science — The Monash Centre for Synchrotron Science is a research institute at Monash University. It was set up to take advantage of the establishment of the Australian Synchrotron, located at the University s Clayton Campus, Victoria, Australia. It is an… …   Wikipedia

  • Monash University — Monash redirects here. For other uses, see Monash (disambiguation). Monash University Coat of Arms of Monash University Motto Ancorā impāro I am still learning Established 1958 …   Wikipedia

  • Keith Nugent — Infobox Scientist name = image width = 300px caption = Keith Nugent with a lobster birth date = Birth date and age|1959|6|28|mf=y birth place = Bath, England death date = death place = residence = nationality = Dual field = Physicist work… …   Wikipedia

  • Monash University, Clayton campus — Robert Menzies Building at the Clayton Campus The Lake near the Halls of …   Wikipedia

  • Storage ring — The 216 m circumference storage ring dominates this image of the interior of the Australian Synchrotron facility. In the middle of the storage ring is the booster ring and linac A storage ring is a type of circular particle accelerator in… …   Wikipedia

  • Clayton, Victoria — Clayton Melbourne, Victoria Clayton Road Shopping Precinct …   Wikipedia

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”

We are using cookies for the best presentation of our site. Continuing to use this site, you agree with this.