This Working Group will be focused on setting up a Target Laboratory for the in-house fabrication of thin films, windows, special radioactive sources, and related items needed for experiments at FRIB.
Message from the Conveners
As we approach the era of FRIB, we should assess the demands for targets, foils, and radioactive materials that will arise. Experiments will be done at energies from keV/u to hundreds of MeV/u, so there will be a broad need for foils of all sizes, configurations, and thicknesses. In addition, the targets will be irradiated by beams varying from particles per second, to >1011 particles/second, so in some cases melting and cooling issues will be important. In this workshop, the infrastructure for the experimental halls and equipment is being discussed. However, we should also consider what target applications and new developments will be necessary to carry out the physics these devices will address. Who will make these targets? It appears that the best place to understand what will be needed is within the context of this FRIB Users Workshop on Equipment.
What can we hope to accomplish? We can begin with the generalization that for the physics undertaken with these rare beams at Coulomb energies, thin films and foils will be necessary – using both stable isotopes and thin radioactive targets. For fast beams, thick targets will be required as well. Other demands might include stripper foils, degraders, target backing foils, detector windows, etc. So, let’s set out to answer the following questions:
- What kind of targets and applications will be needed for FRIB? * Thin foils and films
- How and where will these demands be met? * Dedicated target lab as a part of the FRIB complex
* Thick targets for fast beams
* Stripper foils
* Foils for detector windows and gas cells
* Expand upon facilities already established at MSU
* Another location as "Lead Target Lab"
* Commercially available opportunities
What is envisioned is a set of presentations from the target user community detailing their plans for FRIB experiments so that we might get a feeling for what the demands will be. Also, presentations will be given from target laboratories regarding capabilities and manpower so as to identify where resources might be applied to meet these demands. And finally, from this, to be able develop a roadmap for moving forward toward FRIB operations, along with an anticipation of future target developments.
It is assumed that many of the attendees will have an interest in these discussions but may otherwise be preoccupied in other aspects of the workshop. I ask that you send us (Greene at phy.anl.gov) your comments, needs and new developments for inclusion in our findings. Thank you.
The Conveners of this Working Group are:
John Greene, ANL, Greene at anl.gov [Point of Contact]
John Yurkon, MSU
Walter Loveland, Univ. Oregon
Equipment Workshop Questionnaire
The Target Lab Working Group's Questionnaire for the February FRIB Equipment workshop is linked here.
For More Information
Contact John Greene, ANL, Greene at anl.gov.