1. R 3 B CALORIMETER Large dynamical range p   Spectrometer ((2-3),<5 %  E/E @1MeV) , p Total absorption(~80%, p up to 200 MeV) Reaction experiments at relativistic energies

2. Coordinator : D. Cortina R3B (D.Cortina) / EXL (J.A. Scarpaci)/ DESPEC (J.L Taín) Created in : February 2005 Goal: Find synergies between the different calorimeters in NUSTAR particular stress in the R&D and Desing phase but also common front to negociate with providers List: ~50 members, 16 Institutions, 11 countries Communication: Mailing list, Web page www.usc.es/genp/r3b, regular meetings, Videoconference NUSTAR CALORIMETER Working Group R3B: USC (Spain), LUND (Sweden), IEM (Spain), GSI (Germany), Chalmers(Sweden), Daresbury (UK), Univ. Complutense(Spain), TU Munich(Germany), TU Darmstadt(Germany), UVigo (Spain), Uni Lisboa (Portugal)

3. Characterisation of existing or new scintillation materials and photo-sensors properties.  Intrinsic energy resolution, density  Maximum light emission  hygroscopic  price !!!!  stop and measured high energy p and  (thick)‏  high granularity (for relativistic energies)

4. 2. Angular distribution Kinematical considerations :  emmited by a source @ 700 MeV/nucleon 1. Doppler shift 3. Doppler broadening CALIFA The effective energy in the detectors can be up a factor 3 larger 90% of the emission is between 7-130 degrees Gamma tracking of very hig segmentation Is mandatory

5. Detection of  -rays emitted by relativistic sources Scintillator perfomaces versus semiconductor Ge detectors Ge detectors provide excelent energy resolution (below 1%).......But have low efficiency

6. R3B Cost Matrix R3B Interim MoU

7. Sharing costs and responsabilities Total CALIFA 3.2 M € (price 2005) Spanish contribution 1.2 M€ ~45 % of the estimated costs ~ 8 % of R3B + 270 k€ iToF + 500 k€ common funds

8. R&D CALIFA Working Tasks IEM  Forward part, electronics, simulations USC  General design, simulations, Barrel part UVi  Engineering design and mechanical structure

9. CALIFA Working plan