1. WP3: R&D on ultra low-level detectors and facilities WP3: R&D on ultra low-level detectors and facilities status and outlook Matthias Laubenstein JRA1 meeting, Zaragoza, 10/11 July 2006

2. JRA1 meeting - Zaragoza 10/11 July 2006 YEAR 3 - tasks LNGS: –ULBF facility for gas detectors in operation in progress, delayed by Commissioner works –upgrade of shielded ULBF facility started delayed by Commissioner works LSC: –R&D on feasibility of crystal growth u/g completed

3. JRA1 meeting - Zaragoza 10/11 July 2006 YEAR 3 - tasks LSC (cont'd): –electroforming copper and lead melting facility started up in progress (see pictures)

4. JRA1 meeting - Zaragoza 10/11 July 2006 YEAR 3 - tasks LSM: –optimised cryogenerators operational pulsetube ordered –very low bg and low threshold Ge detectors optimised planar Ge detector ordered –system for radon removal from the air tested and optimised - done –radiochemical measurements and optimisation of this technique started lab has been set up in Saclay; waiting for new buildings in Modane

5. JRA1 meeting - Zaragoza 10/11 July 2006 YEAR 3 - tasks IUS: –Ge/NaI optimised for specialist parts, shield upgrade done or under way –R&D on neutron veto complete, analysis upgraded ongoing

6. JRA1 meeting - Zaragoza 10/11 July 2006 YEAR 3 - milestones & deliverables LNGS: –ULBF facility for gas detectors operative in progress, delayed by Commissioner works LSC: –Technical report on feasibility of crystal growth u/g completed in progress

7. JRA1 meeting - Zaragoza 10/11 July 2006 YEAR 3 - milestones & deliverables LSC (cont'd): –electroforming copper and lead melting facility operative in progress, depends on works on ug lab (e.g. construction of clean room)

8. JRA1 meeting - Zaragoza 10/11 July 2006 LSM: –optimised cryogenerators operative delivery in a few months from now –system for radon removal from the air operative YEAR 3 - milestones & deliverables

9. JRA1 meeting - Zaragoza 10/11 July 2006 IUS: –Technical report on component U/Th and Rn measurements ongoing –muon induced neutron veto operating in progress, test foreseen in the next months YEAR 3 - milestones & deliverables

10. JRA1 meeting - Zaragoza 10/11 July 2006 Recent developments LNGS two new ultra low-level Germanium detectors developed in collaboration with the MPI-K of Heidelberg; all in GS; shielding will be built in September/October 2006;

11. JRA1 meeting - Zaragoza 10/11 July 2006 Achieved improvements GeMPI 2 re-design of sample handling equipment (glove box (-), air lock (++), crane(+)) flushing detector chamber with Rn-pure N 2 (+) stringent material selection (+) incremental improvements –shield for FET made out of Roman lead –low energy calibration source device removed –no end spring on crystal  BG two times better than GeMPI

12. JRA1 meeting - Zaragoza 10/11 July 2006 Planned improvements GeMPI 3 re-design of sample handling equipment (glove box) more stringent material selection incremental improvements –old ship steel screws replaced with copper –less microphony