1 / 18

STATUS of the AURIGA DETECTOR

STATUS of the AURIGA DETECTOR. Giovannni A. Prodi for the AURIGA Collaboration. performances achieved by AURIGA during 2004 see poster on “AURIGA characterization”. AURIGA run II : upgrades. new mechanical suspensions: attenuation > 360 dB at 1 kHz FEM modelled.

joneil
Download Presentation

STATUS of the AURIGA DETECTOR

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. STATUS of the AURIGA DETECTOR Giovannni A. Prodi for the AURIGA Collaboration performances achieved by AURIGA during 2004 see poster on “AURIGA characterization”

  2. AURIGA run II: upgrades • new mechanical suspensions: • attenuation > 360 dB at 1 kHz • FEM modelled • three resonant modes operation: • two mechanical modes • one electrical • new data analysis and data acq.: • C++ object oriented code • frame data format • Monte Carlo software injections • improved noise matching algorithm • selectable templates

  3. AURIGA run II: upgrades ■ Two-stage SQUID: Tn(h) = 97 + 78T(K) ● Single stage SQUID: Tn(h) = 1280 +300T(K) Noise Temperature (h) Temperature (K) • three resonant modes operation: • two mechanical modes • one electrical mode • transducer bias field 8 MV/m • new SQUID amplifier : • double stage SQUID • 650  energy resolution at 4.5 K in the detector

  4. calibration Measurement of the mechanical transfer function of the bar-transducer system Measurement of the impedance seen by the SQUID amplifier input

  5. raw data PSD three resonant modes 1 2 3 Frequency [Hz] Fit data with noise model to estimate the noise parameters

  6. Monday morning Temperatures of resonant modes Detector operating at 4.5 K: the 3 modes achieve the thermal noise level mode 1 mode 2 mode 3 T [ K ] date 13-15 Nov. 2004

  7. … months of diagnostic measurements and noise hunting … Shh sensitivity (1) initial operation at 4.5 K started on Dec. 24th 2003 unmodeled spurious noise peaks within the sensitivity bandwidth • not related to the dynamical linear response ofthe detector • non gaussian statistics • related to mechanical external disturbances • up-conversion of low frequency noise

  8. Shh sensitivity (2) one-sided Shh Very good agreement with noise predictions all these noise sources will scale with temperature

  9. integration of additional mechanical suspension Progress toward a quieter operation

  10. burst sensitivity

  11. H [Hz-1] 10-21 –  [Hz-1] typical sensitivity and efficiency to bursts Nov 13-15, 2004

  12. cumulative event rate above threshold false alarm rate [hour-1] after vetoing epoch vetoes (50% of time) vetoed glitches Remaining events after vetoing candidate events Amplitude distribution of events Nov. 13-14, 2004

  13. False alarm rate vs time events with SNR>4 Duty cycle left after vetoing 15min bins candidate events and duty cycle Nov. 13-14, 2004

  14. uncertainty on arrival time estimates for -like bursts

  15. Receiver Operating Characteristic curves of AURIGA

  16. LHe4 vessel Al2081 holder Electronics wiring support Main Attenuator Thermal Shield Sensitive bar Compression Spring Transducer AURIGA II run

  17. AURIGA II run (mid 2003):upgrades new mechanical suspensions: attenuation > 360 dB at 1 kHz FEM modelled new capacitive transducer: two-modes (1 mechanical+1 electrical) optimized mass new amplifier: double stage SQUID 200  energy resolution new data analysis: C++ object oriented code frame data format

More Related