The DREEBIT Quadrupole Beam Bender is an ion optical device designed to bend charged particles by an angle of up to ±90°. The deflection is realized by quarter-pipe electrodes in a typical vertical electrostatic quadrupole arrangement.
The DREEBIT Quadrupole Beam Bender is an ion optical device designed to bend charged particles of the electric charge q with kinetic energies of up to 25 kV · q by an angle of 90°. The deflection is realized by quarter-pipe electrodes set up perpendicularly to the direction of the incoming ion beam in a typical electrostatic quadrupole arrangement.
With this design, the quadrupole beam bender can be used to guide a beam towards up to three different beamline sections downstream from the quadrupole chamber (directions ±90° and straight). Additionally, the quadrupole is equiped with lenses to correct the shape of the beam after ±90° deflection.
The beam deflection can be set continuously by using standard power supplies or the quadrupole can be operated in pulsed mode. Therefore, a high voltage pulser with built-in power supplies has been developed which is available as optional equipment to the quadrupole beam bender.
max. voltage on quadrupole electrodes
± 30 kV
max. voltage on correction lenses
+ 10 kV
max. ion beam energy
25 kV · q
ion orbit curvature radius
entrance / exit slit diameter
< 500 pF
beamline attachment flange
DN 160 CF, vertical installation
max. bakeout temperature
vacuum conditions during operation
suitable from 1e-10 mbar up to 1e-7 mbar
Scope of Delivery
quadrupole beam bender mounted onto a DN 160 CF flange including shielded HV feedthroughs
HV connectors for attachment of customer supplied cables
power supplies for operation of the quadrupole incl. tailored cables according to customer specifications
high voltage pulser including power supplies, switching of all HV outputs between max. 90 % of max. voltage and ground potential, HV ramping time < 10 µs, min. delay between two "HV on" phases of duty cycles 15 ms