G. LeBlanc

Applying Frequency Map Analysis to the Australian Synchrotron Storage Ring

The technique of frequency map analysis has been applied to study the transverse dynamic aperture of the Australian Synchrotron Storage Ring. The results have been used to set the strengths of sextupoles to optimise the dynamic aperture. The effects of the allowed harmonics in the quadrupoles and dipole edge effects are discussed.

Instrumentation upgrade for Top-Up operations at the Australian Synchrotron

The Australian Synchrotron introduced Top-Up operations in May 2012. Upgrading the machine for Top-Up has required major developments in many of the accelerator systems. Investigations prior to the start of Top-Up operations demonstrated that the Infrared Microspectroscopy beamline was particularly sensitive to injection noise. A gating event has been implemented as part of our timing system upgrade to pause the data collection during injection. In Top-Up mode injections can happen when the gaps of insertion devices are closed. A variable vertical aperture has been installed in the BTS to scape potentially damaging electrons and protect the equipment.

LOCO at the Australian Synchrotron

LOCO has been used during the commissioning of the Australian Synchrotron storage ring with a number of benefits. The LOCO (linear optics from close orbits) method compares a model response matrix to the real machine response matrix. Using this approach we are able to adjust the machine to match the ideal model. Results presented here show that LOCO has provided a high degree of control over a wide range of machine parameters.

Storage ring turn-by-turn BPMS at the Australian Synchrotron

The Australian synchrotrons Storage Ring is equipped with a full compliment of 98 Libera electron beam position processors from I-tech (EBPPs) [1]. The EBPPs are capable of measuring beam position data at turn-by-turn (TBT) rates and have long history buffers. TBT data from the EBPPs has been used to determine the linear optics of the storage ring lattice using techniques developed at other facilities. This is a useful complement to other methods of determining the linear optics such as LOCO. Characteristics of the EBPPs such as beam current dependence have been studied during commissioning and will also be presented.

Final commissioning results from the injection system for the Australian Synchrotron project

Danfysik has delivered a full-energy turn-key injection system for the Australian Synchrotron. The system consists of a 100 MeV linac, a low-energy transfer beamline, a 130 m circumference 3-GeV booster, and a high energy transfer beamline. The booster lattice was designed to have many cells with combined-function magnets (dipole, quadrupole and sextupole fields) in order to reach a very small emittance. The injection system has been commissioned and shown to deliver a beam with an emittance of less than 30 nm, and currents in single- and multi-bunch mode in excess of 0.5 and 5 mA, respectively, fulfilling the performance specifications. The repetition frequency is 1 Hz. Results from the commissioning of the system will be presented.

Lifetime contribution measurements at the Australian Synchrotron

There are always a number of factors that contribute to the lifetime of a stored particle beam. Measurements presented here show the relative importance of these effects during the commissioning of the Australian synchrotron storage ring.

Preliminary studies for top-up operations at the Australian Synchrotron

The Australian Synchrotron is now a fully commissioned synchrotron light source providing beam for users [1]. With the facility now fully operational, the next major advancement in machine operations will be top-up mode. The advantages of running in a dynamic top-up mode are well documented by other third generation light sources (see for examples references [2, 3, 4]) ; in broad terms it leads to a better quality beam for some users, and better experimental results. An overview will be given of the top-up runs that have been conducted and the instrumentation that was used. It has been demonstrated that top-up operation is possible, however improvements in injection efficiency and beam stability during injection are required before this can become a routine mode of operation.

Measurements of impedance and beam instabilities at the Australian Synchrotron

In this paper we present the first measurements of machine impedance and observed beam instabilities at the Australian Synchrotron. Impedance measurements are made by studying the single bunch behaviour with beam current, using optical and X-ray diagnostic beamlines. An observed coupled-bunch instability, its cause and cure is also discussed.

Time Resolved Detectors and Measurements for Accelerators and Beamlines at the Australian Synchrotron

Time resolved experiments require precision timing equipment and careful configuration of the machine and the beamline. The Australian Synchrotron has a state of the art timing system that allows flexible, real‐time control of the machine and beamline timing parameters to target specific electron bunches. Results from a proof‐of‐principle measurement with a pulsed laser and a streak camera on the optical diagnostic beamline will be presented. The timing system was also used to fast trigger the PILATUS detector on an x‐ray beamline to measure the fill pattern dependent effects of the detector. PILATUS was able to coarsely measure the fill pattern in the storage ring which implies that fill pattern intensity variations need to be corrected for when using the detector in this mode.

The MAX-III storage ring

MAX-III is a 700 MeV storage ring for synchrotron radiation that is being built at MAX-lab. The ring will provide radiation in the UV and IR spectral regions. The ring will have a 100 MHz RF system combined with a 500 MHz passive Landau cavity. The lattice is compact, with combined function magnets. The magnets are integrated into the girder providing for ease of alignment.