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Hi All:
I posted a final version of my CERN Oberon Day presentation at the
following location:
http://web.pas.rochester.edu/~skulski/CERN_OberonDay.ppt
http://web.pas.rochester.edu/~skulski/CERN_OberonDay.pdf
I think it is important to point out real-life examples of using
BlackBox in order to win support of collegaues and management.
A few nice pictures or screenshots go a long way towards convincing
people. I have myself used this method during a recent informal
review of my Laser Lab project. It helped that I could point out
important projects done by others, in order to demonstrate widespread
use of the environment. PR does matter. I hope you will be able to
use my presentation in a similar way.
Here is a brief description of the experiments:
1. Student experiment #1 Light Attenuation in Plastic Scintillators.
Two plastic scintillators, one small 1x1x1 cm cube, the other
long slat 0.8x0.8x20cm. Three phototubes: one connected to the
small cube, two connected to the ends of the slat. The small cube
was positioned at several locations just above the slat in order
to trigger when a cosmic ray traversed both scintillators.
The light pulse generated in the upper scintillator, after convertion
to an electric pulse, was the trigger. The light pulse emitted
in the lower scintillator (the slat) was emitted equally to the left
and to the right. The objectve: measure the position where the
light pulse was created in the slat, using two methods: (1) the
time difference left-right; and (2) the light attenuation along
the slat; correlate with a known position of the trigger cube.
The equipment: ORtec ADC type AD811 to measure pulse amplitudes,
Tennelec time-to-amplitude converter and LeCroy charge-sensitive
ADC 2249W to measure time difference. All digitizers were housed
in a CAMAC crate. Jorway CAMAC controller 73A was used to read the
CAMAC crate, using BlackBox for data acquisition. Plotted in the
slide #4: pulse-height spectra from the AD811 show a clear peak
around channel 800. This is the minimum-ionizing-particle (MIP)
peak due to cosmic-ray mu-mesons. The sharp peak near zero is
due to electronic noise. Lower histogram: time difference between
the trigger cube and left- and right- ends of the scintillator slat.
The time diffrences would change as the cume was moved along the slat.
(The latter is not shown in the slide, whic only shows the experimental
display.)
2. Student experiments #2 and #3 used a waveform digitizer shown
in slide 5. The experiment #2 (slide 6) was actually a senior thesis.
The student measured several things, e.g., particle identification
in inorganic scintillator CsI(Tl), as well as energy resolution
of another type of scintillator NaI(Tl). The particlar spectrum
in slide 6 shows a gamma ray spectrum collected with NaI(Tl) coupled
to a phototube. This is just a sample of the student's work. My graphics
Gr is used both for the waveform display and for histograms.
Experiment #3 (slide 7 and 8) was a summer project. The student put
together the experiment (slide 7) and collected a few thousand
cosmic-ray mu-mesons in a large plastic scintillator. Muons decay
after being stopped, and the student measured the lifetime with
fairly good precision, as shown in slide 8.
3. The Laser Lab project in next two slides is my current project,
recently discussed on this list.
4. Industrial GUI development is shown in the next few slides.
I hope these slides will help everybody impress your collegaues
and bosses and help getting more support for your own BlackBox
projects, by showing that this tool works elsewhere fairly well.
I wish to thank Robert for his wonderful library that I am now using
for image processing and display, as shown in two slides. I am barely
scratching the surface of his software collection. The Laser project
would be barely possible without Robert's 2D display and the Fourier
transform package. Many thanks!
Wojtek
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Received on Thu Mar 04 2004 - 07:21:14 UTC