supernova/acceleration probe l u o slac user’s organization meeting “redefining the user...
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SuperNova/Acceleration Probe L U O
SLAC User’s Organization Meeting
“Redefining the User Facility”
February 7, 2008
Gregory Tarlé
University of Michigan
A New Type of SLAC User
Gregory TarléProfessor of Physics, University of MichiganResearch Focus: Particle
Astrophysics/CosmologyCurrent Research: Dark Energy (SNAP and
DES), Cosmic Rays (CREST)Past Research: MACRO, HEAT…
Supernova / Acceleration Probe
A large wide-field space telescopewith a 0.6 Gpixel visible/NIR imager anda visible/NIR spectrograph will provide:
• A much larger statistical sample of supernovae (2000 SNe with 50 SNe/0.03 z).• Much better controlled systematic errors (1 – 2%).• A much larger range of redshifts (out to z = 1.7) than can be obtained with any other existing
or planned instrument.
• Use type Ia SNe as standard candles to measure expansion history of the Universe over 2/3 of the age of the Universe.
• Complementary Weak Lensing survey will measure the growth of structure probing the competition the competition between Matter and DE.
SNAP NIR Program
• NIR Project Lead: G. Tarlé• Participating Institutions: Caltech, GSFC, IU, JPL,
RIT, UM• Procure 36 Science Grade Flight NIR detectors
meeting SNAP science requirements.• Procure FE electronics for above (SIDECAR)• Characterize and calibrate flight NIR detectors• Teledyne Imaging Sensors (TIS) has emerged as
the leader for manufacture of large format SWIR HgCdTe Focal Plane Arrays.
The Michigan SNAP Group
Wolfgang LorenzonPrecision
Photometry
Shawn McKeeSimulation Software
Tools
Gregory TarléSNAP NIR Coordinator
UM Task Leader
Tim McKay Auxiliary Science
Dave GerdesScience Simulations
Thomasz BiesiadzinskiDetector
and Cosmology Simulations
Michael SchubnellUM Lab Coordinator
Data Analysis
Graduate StudentsProfessional Staff
Faculty
Research Scientists
Undergraduate Students
Curtis WeaverdyckNIR Lab Eng.
Bob NewmannAnastasiaKarabina
Thomas ZurbuchenElectronics
Steven RogackiSIDECAR
Resources at UM available to SNAP
• UM Physics shared facilities: – Electronics shop (1 engineer + students)– Mechanical shop (2 machinists)
• UM Space Physics Research Lab (SPRL) shared facilities. – Clean room – ~dozen engineers, managers w/space flight
expertise
Michigan NIR Laboratory Calibrated Flat-field Illuminator
ESD safeenvironment
Spot-o-Matic
Quantum Efficiency setupDewar #1
Readout electronics
Dewar #2
Power supply and temp. controller
Coordinated by Michael Schubnell
Equipment developed mostly by students
The Michigan NIR Detector Lab
Towards SNAP Science Grade Detectors
• SNAP NIR in excellent shape; performance of NIR detectors better or as good as required at beginning of R&D.
• Latest Teledyne detector lots promising • Goal:
• produce ‘home run’ science grade device based on optimized recipe (high QE and very low noise)
• 12 layers grown successfully. Four looking very promising (PEC results)
– Hybrids from lot 4 and lot 5 are being packaged (SNAP SiC flight package)
– Expect new devices delivered in March 2008
• Space version of FE electronics under development
Our SNAP Collaborators at SLAC
Gunther HallerSNAP Electronics System Manager
Roger BlandfordDirector of KIPAC
Kevin ReilStaff Physicist
SNAP star tracker
Leonid SapozhnikovEngineer
SNAP DAQ hardware
Sergio MaldonadoEngineer
SNAP DAQ software
Dave TarkingtonEngineer
SNAP Elect./Mech.
Aaron RoodmanGroup Leader
Dave NelsonEngineer
SNAP Elect./Mech.
SIDECAR• Teledyne has developed a read-out ASIC (SIDECAR), specifically designed for use with the H2RG multiplexer (ROIC for 2k x 2k FPAs). This ASIC is designed to handle the clocking, biasing and read-out of all 32 channels of our HgCdTe FPAs.
• SIDECAR electronics under evaluation at UM and SLAC
• UM: Supported by SPRL @ UM (Prof. Thomas Zurbuchen and Steve Rogacki (engineer)). Established functionality and read-out of cold detector (w/ warm Teledyne SIDECAR Development Kit (SDK))
• SLAC: Gunther Haller’s group, as part of the SNAP electronics effort developed EGSE and DAQ. Replaced Teledyne interface and (JADE card) and DAQ with documented open system with easily modifiable software. (1 unit to UM by Feb 2008)
SLAC
UM
SIDECAR
Adapter Board (SLAC)
cPCI crate
Instrument Communication Board (SLAC)
cPCI MCP750 processor
SLAC
EGSE Provided by SLAC
EGSE DAQ Provided by SLAC• Linux host client connects to EGSE crate
– Ethernet TCP/IP sockets• User Interface on Linux host
– Python shell API or PyQt graphical application– SIDECAR acquisition controls– CRIC acquisition controls– ICU controls and settings– Configuration upload and dump– Image upload and dump– Telemetry display– Message logging– SAO DS9 integration
• Python command line API or PyQt graphical application provides real-time configuration and control of ICU and Sidecar/CRIC front ends
• File based Sidecar front end configuration executed via Ethernet load• System commanding and telemetry uses CCSDS protocol over
Ethernet• Python shell API supports integration with offline analysis utilities• PyQt graphical application provides interactive system control
SLAC Support for SNAP
• Development of tracker (fine guider) using 4k x 4k HyViSi FPA.
• Instrument Control Unit• EGSE setups for Caltech, Teledyne, French
spectrograph group, I&T site…• Software support, modifications to optimize
performance of detectors.• CCD imager ASICs
Future Possibilities for SLAC Participation/Support for SNAP
• Electronics Engineering expertise
• Mechanical Engineering expertise
• Experienced space qualified technicians
• Computing support - SLAC experience with large datasets/database
• Analysis pipeline
Conclusions• Although LBNL is the lead DoE laboratory on
SNAP, SLAC has a vital role to play.• SLAC is already proving to be a valuable partner
in SNAP through the development of flight electronics and software.
• SLAC is an ideal partner for university groups that do not have the facilities and experienced manpower present at SLAC.
• As a new type of SLAC user, I am extremely grateful for SLAC participation in SNAP and their contributions to the NIR program.
• I hope/expect that the association of the SNAP NIR group and SLAC will continue to grow.