1 / 13

150 Nd Project

150 Nd Project. Nd crystals used so far. News about NdGaO 3. Scintillating Bolometers. Conclusions & Prospect. Two Crystal compounds. 16 g sample 200 g sample. NdGaO 3. Good “theoretical” candidate. The small sample was tested at sea level @ Milano-Bicocca and Firenze.

stuart
Download Presentation

150 Nd Project

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. 150Nd Project • Nd crystals used so far • News about NdGaO3 • Scintillating Bolometers • Conclusions & Prospect Stefano Pirro, IDEA Meeting -Orsay April 14 , 2005

  2. Two Crystal compounds 16 g sample 200 g sample NdGaO3 Good “theoretical” candidate The small sample was tested at sea level @ Milano-Bicocca and Firenze The big sample was tested deep underground @ LNGS Stefano Pirro, IDEA Meeting -Orsay April 14 , 2005

  3. PTFE supports 1.3x1.3x1.3 cm3 NdGaO3 Milano-Bicocca Test Paramagnetic heat capacitance Final temperature 38.5 mK Stefano Pirro, IDEA Meeting -Orsay April 14 , 2005

  4. NdGaO3 Firenze Test The main difference was in the choice of the thermal conductance between crystal and Cryostat. The choice was a hard contact in order to cool down the crystal to lower temperatures with respect the ones reached in Milano. Nylon wires 1.5 cm2 thermalization surface Cu-NdGaO3 Mixing chamber Temperature: 20 mK Stefano Pirro, IDEA Meeting -Orsay April 14 , 2005

  5. NdGaO3 LNGS Test 200 g 3x3x3 cm3 PTFE supports (low conductance) Two different set-up were used Low conductance set-up High conductance set-up Stefano Pirro, IDEA Meeting -Orsay April 14 , 2005

  6. NdGaO3 LNGS After 10 days the temperature reached was ~34 mK After 70 days the temperature reached is ~16 mK We see thermal pulses, but some Serious doubts arise on the identification of actual particle pulses Injected thermal energy of ~ 1300 keV Stefano Pirro, IDEA Meeting -Orsay April 14 , 2005

  7. New Run Hall C We mounted the small NdGaO3 Crystal. The aim is to see if,, due to the smaller mass, we are Able to recognize actual particle pulses. The run started Friday 8 April. The temperature is slowly decreasing and is now around 30 mK. Stefano Pirro, IDEA Meeting -Orsay April 14 , 2005

  8. Innovative Techniques Several tests were made in the R&D cryostat @LNGS during the lasts months The idea is to move towards a active background rejection Double readout heat - light 100Mo 3034 keV Nuclei with Q-Value above the 208Tl -  line 48Ca 4271 keV 116Cd 2802 keV We developed suitable bolometric light detectors with a Energy resolution of 3050 eV Stefano Pirro, IDEA Meeting -Orsay April 14 , 2005

  9. Light detector MgMoO4 PbMoO4 CaMoO4 SrMoO4 Stefano Pirro, IDEA Meeting -Orsay April 14 , 2005

  10. Large-Surface Light detector Stefano Pirro, IDEA Meeting -Orsay April 14 , 2005

  11. PbWO4 CaMoO4 SrMoO4 Scatter Plots Stefano Pirro, IDEA Meeting -Orsay April 14 , 2005

  12. First “LARGE” mass high RESOLUTION scintillating bolometer for DBD 150 g of CdWO4 Stefano Pirro, IDEA Meeting -Orsay April 14 , 2005

  13. Conclusions • Neodimuim-based Detectors/Bolometers shows clearly the • difficulties of this compound • There is, nevertheless, some hope to have some new results • The use of the enriched Nd is, in my opinion, one of the last chance • The “new” implementation of scintillating bolometers clearly • shows the easy feasibility of a “new” powerful experiment • Lot of effort is needed in order to identify a suitable scintillating • compound Stefano Pirro, IDEA Meeting -Orsay April 14 , 2005

More Related