lamp decay
Thursday 26 January 2012 - Filed under Uncategorized
:: Share or discuss :: 2012-01-26 :: jxie
Content
Notes of LAPPD Photocathode Development
Sb deposition in chalice
Tuesday 24 January 2012 - Filed under Uncategorized
:: Share or discuss :: 2012-01-24 :: jxie
DAQ Software to Control and Read TDK-Lambda Power Supplies
Friday 18 November 2011 - Filed under Uncategorized
I have created software to control, read and log data from a TDK-Lambda GENH. Below are plots of data collected from scan of output current recording current, voltage, calculated power for a 25 ohm load resistort, and a time scan showing the record power while driving the load at constant current. One conclusion from the time scan data could be the measurement precission of better than 1mV. Ed May
:: Share or discuss :: 2011-11-18 :: edmay
Software to read and control SPECTRA VACSCAN RGA
Wednesday 9 November 2011 - Filed under Uncategorized
Sample 24 hour DAQ collection of data from SPECTRA VACSCAN RGA on Chalis in Burle.
Using RS232 interface and python script running on Window7 PC. Data collected 4-5 Nov 2011.
Ed May
:: Share or discuss :: 2011-11-09 :: edmay
Evaporator control and DAQ
Tuesday 18 October 2011 - Filed under Uncategorized
A Sketch as GIF file.
Notes on evaporatorDAQ.text.
Ed May
:: Share or discuss :: 2011-10-18 :: edmay
Test Measurement PC IV curve with LabWindows C code
Friday 16 September 2011 - Filed under Uncategorized
Data acquired using prototype C program developed in LabWindows/CVI evaluation product.
Figure 1a IV curve with linear V scale
Figure 1b IV curve with linear V scale
Figure 3 Distribution of 20 current measurements at a fixed voltage.
Burle PMT labeled #2, using Keithley 6517B Electrometer.
Ed May
:: Share or discuss :: 2011-09-16 :: edmay
Report for stray ultra-violet radiation of the optical station
Thursday 15 September 2011 - Filed under Uncategorized
:: Share or discuss :: 2011-09-15 :: jxie
Comments on reading Klaus’ draft note on P.C. lab commissioning
Wednesday 14 September 2011 - Filed under Uncategorized
Klaus,
Here are my notes and comments on my first reading of your
Commissioning note.
Ed
PC needs to be defined as photocathode so as not to be confused with conventionsmeaning.
table 1.1.1 is Table 1
Column 1 header should say “Characterization Techneque”.
UHV-Chamber and Burle are clear to me, but “External…” and “Syncrotron …”
is not.
Section 1.1.4 needs a diagram(s)!
Something is missing after “The absorption coefficient or th”
Something is missing after “the proposed techniques explaining which”
Does section 1.2 imply there are 2 different QE/transmission/reflection
setups?
Need a diagram of the “QE/transmission/reflection” setups.
In section 1.3.1 (and maybe others) needed to identify the model numbers
of each piece of equipment.
What does “NI-data-aquisition system alternatively to Keithley” mean?
“measurements are done with a defined cable set” implies an identification
and labeling scheme needs to be defined and implemented.
I think “characterized by the mean and variance of the set of
measurements. It is a two-dimensional vector.” should also include the
number of measurements used to calculate the mean and variance, thus a
three vector.
Under “The data-acquisition system should provide the following options
point 2 “to make sure that filter constants…”. I am not sure I understand
this … it is about the averaging time or setteling time should depend on the
RC time constant of the amplifier? Are these determined once for a readout
system or determined before each run of a measurement? Needs discussion!
A point on what meta-data needs to be accumulated with each data set should
be added. For example: time, date, operator, sample id, etc should be
linked to data set.
How is the neutral density filter adjusted and controled? Is it a wheel of
fixed values or a continously varying wheel. Is there a precission stepping
motor to adjust it?
The ~ and – are very difficult to distinguish in Figure 2: caption!
Have any of the measurements descripted in the text been attempted with
the existing equipement?
:: Share or discuss :: 2011-09-14 :: edmay
Network and DAQ for 360 Labs
Saturday 10 September 2011 - Filed under Uncategorized
Here is a URL link to existing documentation on
Network and DAQ planning.
http://www.hep.anl.gov/may/LAPPD
LINK
:: Share or discuss :: 2011-09-10 :: edmay
UIUC Bonding Status
Friday 2 September 2011 - Filed under Uncategorized
Quick update to what needs to be done over the following weeks
Ryan
:: Share or discuss :: 2011-09-02 :: rdowdy2