ASTRID Technical Specifications
ASTRID is a small (40 m circumference) dual purpose storage ring which has been in operation since 1990.
In electron-mode it operates as a 580 MeV electron storage ring, injected from a 100 MeV racetrack microtron.
In ion-mode, many types of ions in different charge states can be stored, injected from either a 150 keV electrostatic ion accelerator or an EBIS ion source. Ions can then be accelerated further in the ring with the maximum attainable energy determined by the rigidity of the dipoles. The maximum energy for a mass of 1amu is about 165 MeV. Ions of both polarities ranging from mass 1 (Hydrogen atom) to mass 840 (Carbon 70 cluster) have been stored.
Maximum energy 100 MeV (19 turns, 5.3 MeV steps) Pulse current 10 mA RF 2.9986 GHz Pulse length 1 microsecond Max repetition frequency 10 Hz Energy spread 0.1 MeV Emittance 0.1 mm mrad Dipole field 1.13 T
Maximum Energy 580 MeV Max Current (2005)
Without narrow undulator chamber
286 mA Typical Stored Current 180-220 mA Lifetime (at 150 mA) 100-120 hours Horizontal emittance 0.16 mm mrad RF Frequency 104.9 MHz No. of bunches 14 SR critical energy 0.38 keV Dipole rigidity 1.9 Tm Quadrupole max gradient 6.7 T/m
Injection energy 5-150 keV RF frequency 0.3-5.0 MHz
Ion pumps 20 Sublimation pumps 24 Pressure (ion beam, typ) 2.5 x 10-11 torr Pressure (electron beam, typ) 1 x 10-10 mbar
Last Modified 29 March 2010