Weekly Progress Reports
Week 1: 5 Feb. 2001
At the middle of this week, I began to read an uncompleted report
by Mike Twardos for his NSF summer project in 1999, as well as some
references in that report.
Week 2: 12 Feb. 2001
The project seems quite difficult because of its weak signal (<1e-11watt),
but it's so interesting, I decided to take it. After talking
with Dr. Noe, I got some references (as well as some others I found
from INSPEC, PROLA and SPIN websites).
R. Corey, M. Kissner, and P. Saulnier, "Coherent Backscattering of Light", American Journal of Physics, Volume 63, Number 6, June (1995).
Week 3: 17 Feb. 2001
I am continuing reading some recently paper including some paper about
observation of CBS in laser-cooled cluster.
Week 4: 24 Feb. 2001
The optical components has been ordered this week!
Week 5: 3 Mar. 2001
I have set up some of optical components, but we found we
the polarized light selective beam splitter does not suitable.
We have ordered another one.
Week 6: 10 Mar. 2001
Now we have made PMT system work and have made almost everything done. THe only problem is, the crew of quarter wave plate holder is not of US standard. So, it is a little tilted. We can not obtain circular polarized light with it. We are ording some adepters.
Week 7: 17 Mar. 2001
In this week, I made everything work and measured the intensity spatial dependence of scattering light in both vertical and horizontal directions. The results are list below. Also, a step-in motor drived scanning system were setuped to automatically measure the intensity spatial dependence of the scattering light. With this device, a more detailed CBS curve were obtained and the background were subtracted.
Automatically Scanned CBS Curve(Horizonal)