Plan For Instrument Testing in the ANSS C

Plan For Instrument Testing in the ANSS C. R. Hutt and J. R. Evans Quiet Test Location: Albuquerque Seismological Laboratory 1

Subsurface Tunnels in Granite Performing tests of Super-isolated STS-2 in ASL tunnel Bob Hutt, Erhard Wielandt, and Peter Melichar in front of ASL test tunnel February 16, 2006 Rotation Workshop 2

Current Facilities and Capabilities at ASL n Test Facilities – Subsurface: Tunnels (approx. 15 m depth) and deep boreholes (100 to 200 m depth), all in granite » Very low background noise » Excellent temperature stability – Shallow: Surface and near-surface vaults and boreholes » Large concrete piers attached directly to granite (former WWSSN) n Reference Instruments (low noise, well-calibrated) – STS-1 (3 components) – ANMO GSN station (Geotech KS 54000 and Guralp CMG-3 TB borehole instruments) n Data Acquisition Systems – Several 12 channel 24 -bit high resolution data acquisition systems (Q 680) n Experienced Personnel n Analysis Software – Self noise, power spectra, digital filtering, automated calibration analysis (under development) n Low Distortion Oscillator (old - limited life? ) n Calibration Step Table (Lennartz - Wielandt design) n Old Russian shake tables - not currently operational – Need new control electronics to make operational – Usable as noise isolation tables? February 16, 2006 Rotation Workshop 3

Proposed Upgrades to ASL Test Facilities n More high resolution data acquisition systems – Q 330 HR – Q 680’s from GSN n More reference instruments – Dedicated STS-2 – Sundstrand QA 2000 accelerometer n n n Super-isolated STS-2 Environmental test chamber HP/Agilent 3458 A Digital Multimeter (8. 5 digits) HP/Agilent 35670 Dynamic Signal Analyzer High precision tilt table High precision strong motion shake table Q 330 s and Balers Erhard Wielandt demonstrating step table with tilt attachment – High priority, but expensive ($50 k - $250 k) n EMI/RFI/Magnetic field generation and test equipment n Additional Calibration Step Table(s) February 16, 2006 Rotation Workshop 4

Proposed Upgrades to ASL Test Facilities (cont. ) n Software development – Support standardized testing and reporting per Guidelines for Seismometer Testing Workshop – Easier to use (GUI, etc) Gary Holcomb (now retired) and Leo Sandoval with rotational meter developed at ASL n Rotational Sensor: Continue development (see picture) n New Low Distortion Oscillator (? ) n Use old Russian shake tables as isolation tables (? ) – No modifications required on vertical table – Fit centering springs to horizontal table n Make the old Russian shake tables operational as shake tables (? ) – Obtain un-used high current drivers from UCSD? – Work with Erhard Wielandt under Senior Scientist-in-Residence Program February 16, 2006 Rotation Workshop 5