WebHome < Cahill

---+!! %MAKETEXT{"Caltech Optical Observatories [_1] Reference TWiki" args="<nop>%WEB%"}%

---++ %MAKETEXT{"Cahill Center for Astronomy and Astrophysics"}%
   * <a href="http://wikis.astro.caltech.edu/groups/cahill/">Cahill Building Wiki:</a> with links to general building information, email lists, maps, etc.
   * <a href="http://aries.caltech.edu/mrbs/month.php?year=2010&month=02">Conference Room Schedule</a>

---++ %MAKETEXT{"General Instrumentation Meetings and Workshops"}%
   * [[GPUAstronomy][100930 Applications of GPU's for Astronomy]]
   * [[GLAO_Workshop][140914 Ground-layer AO (GLAO) Workshop]]
   * [[EMCCDSpectroscopy][150728 EMCCD Spectroscopy Workshop]]

---++ %MAKETEXT{"COO Lunch Time talks"}%
   * [[Kaye on Grounding and Sheilding][2017-06-29 ZTF Grounding and Shielding]] Steve Kaye
   * [[Flat Field Forensics][2017-07-05 Flat Field Forensics]] Timothee Greffe

*Shifted to 12:30pm Wednesdays.*  See links above for details.
| July 5 |Timothee Greffe|	*Flat Field Forensics* | Bizarre dips observed in variance curves for many e2v CCDs are explained by Tim for the first time.  The Downing Dip and the Bilgi Bump each flagged different subtle charge transport problems which could have severely impacted ZTF.|
|July 12 |Justin Belicki| *Using inductance to measure holding force of Electro-Permanent Magnets*| Inductors are complicated and permananet magnets doubly so.  Justin reports on a clever method to encode a magnetic latch with no additional parts.|
|July 19 |Peter Mao| *Optmizing the ZTF pixel timing*| Peter will present experimental methods that are allowing us to squeeze every last bit of &#8220;overhead&#8221; out of the pixel time to maximize noise averaging at 1 MHz pixel rate, or to go even faster.|
|July 26 |Pavan Bilgi|	*Concurrent Clocking*| Pavan shows off a magic trick that makes most of the parallel transfer overhead disappear and reveals his next trick which will be to make charge traps disappear.|
|Aug 2 |Michael Feeney|*JT Cooler Survival Guide*| Michael tells how we escape from the grips of Polycold, an unreliable and expensive supplier, by developing in-house capability to diagnose and fix Cryotiger problems, find alternate sources, and refurbish used parts.|
|Aug 9 |Roger Smith |*Vacuum Advice*| What's important?  What's not?   How much to pump and how seldom.   Initial cleaning and baking.   Use a leak detector as your pumping station, but don't do stupid stuff. Cold traps.  Underlying physics.  Vital roles of getters and desiccants.  Gauge types and ion pumps.  How your cooling system affects all this.|
|Aug 16|Smith or Kaye|*Waveform Definition Language*|Detector readout optimization is all about timing and voltage levels.   Its complex and so we need agile tools.  Like a compiler interpretting a high level language and implementing it on any processor, our Waveform Compiler interprets _timing rules_ organized however the user sees fit, and turns these into Archon Configuration files to make those waveforms happen, or plots them on a screen in a matter of seconds as if we had a high channel count oscilloscope.  At the same time the tool keeps the host software informed so it can accommodate changes such as which combination of output amplifiers are in use or how many overscan pixels/lines are need to be recorded in the FITS file and how to write headers.  This *single point of control* is very powerful for test automation.| 
Suggestions for talks?  ...contact Roger Smith, rsmith@astro.caltech.edu

---++ %MAKETEXT{"Universities Space Research Association"}%
   * <a href="http://usra.edu">USRA Home Page</a> - R. Dekany, USRA Representative
 
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This topic: Cahill > WebHome
Topic revision: r42 - 2017-07-03 - RogerSmith