Information for visitors and collaborators
The maintenance and development programs for the accelerators in the department of nuclear physics have resulted in the facility having a very high duty factor. This allows adequate beam time to be scheduled for both the intensive research programs run by the various research groups within the department of nuclear physics, and for time to be allocated to external users of the facility - either through collaborations with department members or independently as external users of our national facility. If you are interested in accessing the facility please contact our program coordinator at the address below for details and costs. Parties interested in establishing a collaboration with the department should make contact with the relevant contact person as listed on our Collaborative Opportunities page.
The Heavy Ion Accelerator Facility is located on Garran road within The Australian National University Campus, and is less than 2 km from the centre of Canberra. The 14UD accelerator is housed in building 58a (Map B4) in the Research School of Physics and Engineering and is adjacent to, and can be directly accessed via, the Department of Nuclear physics - building 57 (Map C4).
The Heavy Ion Accelerator Facility comprises a 14 UD Tandem Pelletron electrostatic accelerator (14UD accelerator), which routinely operates at voltages of up to 15.5 MV. The 14UD can inject beams into a superconducting linear accelerator (LINAC), which is capable of doubling the beam energy if higher energies are required. The maximum beam energy from the 14UD is limited by the 220 MeV.amu/e2 double focusing annalysing magnet. One of two ion sources can be used to provide ions to be injected into the accelerator.
A single sample gas cathode equipped SNICS II source can provide beams of almost any naturally occuring stable isotope. Beam intensity is usually limited by the ability to transmit ions through the accelerator, maximum beam currents are typically ~ 1 microamp.
A 32 sample MC-SNICS source can be used to alternate between different beam species if required. This allows the injected beam species to be changed without the need to break and re-establish vacuum in the ion source.
The ion sources feed a high resolution injector system and a comprehensive pulsing system. The pulser boasts a programmable chopper which produces intervals of beam as short as 50 ps with repetition rates from sub microseconds to multi-milliseconds. A double gridded buncher, operating at 9.375 MHz, plus two harmonics, compresses the beam into pulses less than 1 ns wide at injection into the 14UD. Two orthogonal post acceleration choppers clean up the pulses. The phase detector is in front of the image slits of the energy analysing magnet.
The high voltage terminal of the 14UD includes a gas stripper differentially pumped by two turbopumps and two ion pumps. This is followed by the existing foil stripper and electrostatic triplet quadrupole lens. All terminal equipment is controlled via optical cable.
At present the beam can be used at one of 11 different detector/target chamber stations, with a beam rastering option available on the central beam line.
A team of experienced technical staff within the Department of Nuclear Physics maintains the facility and provides user support. Assistance with beam extraction and delivery can also be provided. Extensive workshop services for target chamber and beam line equipment manufacture, modification or development is also available through both the technical staff within the department and from the Research School of Pysics and Engineering (RSPE) mechanical workshop. Assistance with electronic components and computational issues is also available through the RSPE electronics workshop and school computer unit. The department's computer specialists can also provide computational assistance with data collection.
ANU has a number of accommodation options available while you visit the department, including on-Campus apartments and residential halls. Details can be found on the University Accommodation website. Short term visits are perhaps best addressed at the visitors section of this site. Our departmental administrator can also provide assistance with accommodation bookings if required.