Information for HRIBF PAC-14 Proposals

mass difference calculator	Estimate isobar contamination
TOPS	Estimate tandem voltage and beam charge state(s)
RIB yields	Measured or estimated yields
Velocity calculator	Time-of-flight or Doppler shifts

We encourage you to contact us with suggestions for the beams you require to pursue your physics research. Parameters as to what constitutes a suitable beam for the HRIBF may be found in our more recent newsletters.

We ask that you be aware that scheduling experiments at our facility is not straightforward; several experiments must be available before there is "critical mass" so that it is cost effective to schedule a particular RIB ion source or endstation configuration.

Additional information reflecting the present status of equipment and techniques is provided on our equipment web pages. You are encouraged to contact the mentor of the equipment should you have any questions. Information from previous PACs is provided below.

Ranging out for decay studies

LeRIBSS - Low energy Radioactive Ion Beam Sepctroscopy Station

This beamline will soon be ready for commissioning. The line itself is under vacuum and electrostatic power supplies are on order. We expect initial tests to be conducted in the early part of 2008 and have it available for experiments shortly thereafter. Beams for LeRIBSS can be positively or negatively charged and should be at least a factor of 10 more intense than the values for single-stripped beams. In addition, yields for positively charged neutron-rich ions will be higher as they do not require charge exchange. Values (measured and estimated) for charge exchange efficiency can be found at neutron-rich beams 2001 webpage.

We strongly encourage you to submit proposals using LeRIBSS at this PAC.

^25,26Al beams

Rotating target at the RMS

The new 14-mm diameter rotating target for decay studies at the RMS has been commissioned. Suitable for intense stable beams or even extremely delicate targets for radioactive beams (e.g. sulfur-compound targets), the small DC motor assembly is located inside the vacuum chamber. Initial experiments with Fe beams on Ni targets have successfully used a factor of 2.5 higher beam current or up to 40 pnA on a nominal 300 μg/cm² target. These rates lead to several thousand, mass selected, heavy-ion implantations per second with focal planes slits set to allow two charge states of one mass to reach the focal plane.