NUSTAR CALORIMETER WORKING GROUP News + organisation The goal of this working group was to find synergies between different calorimeter related developments within NUSTAR The truth : we are basically addressing R3B developments and in a minor extent EXL Issues: - activate the contact with HISPEC/DESPEC  J. Tain (Valencia) - identify in our mailing list who is active in the field  request information via mail +CC to all the NUSTAR spokesperson  important because we have to start thinking about TDR - After signature of FAIR identify new formal collaborators (INDIA, RUSSIA)  to be addressed in our next NUSTAR meeting

A spanish delegation visited St. Gobain crystals last week We had a long discussion with the experts + commercials Issues: NEWS FROM ST. GOBAIN on NEW SCINTILLATORS LaBr  They currently achieve 2.6 % energy 662 keV  They have developed a robust growing technique  can go for production  What do they offer is a “commercial” solution, the improvement is based on the fact that they can produce large pieces keeping the energy resolution  Personal impression : the growing process is not as easy as they said LaCl  They achieve a moderate energy resolution 662 keV  The growing technique is really robust  translated in lower prices  Due to the lower performances compared with LaBr they have not spend any real effort in this product

St. Gobain wants to attract the nuclear physics community but they follow a very commercial approach Together we identify an R&D program, that once completed, would allow to go from crystals in its actual form to real nuclear physics detectors What do they expect from us is to sign an R&D contract with them (this basically means: we pay they work for us)  this is something to be discussed in the different collaborations We pointed out the interest of establishing real collaboration on very focused subject  This could be a first step towards the definition of a real R&D program To come back to the reality CsI (Tl) ……………..5-7 € cc LaCl 3 (Ce)……………20-30 € cc LaBr 3 (Ce)……………40-50 € cc

Calorimeter contact person in the Silicon group V.Avdeichikov Calorimeter contact person in the DAQ, FEE group R. Lemmon Prototype coordinator O. Tengblad R3B/EXL CALORIMETER News + organisation The mechanical engineering group of the University of Vigo has started to work in the mechanical design of the R3B calorimeter where we are? …. R3B/EXL CALORIMETER Prototype