U N I V E R S I T Y. OF. LOUISIANA. L a f a y e t t e. RockSat 2010 Team CajunSat. Mark Roberts Dr. Andy Hollerman Department of Physics University of Louisiana at Lafayette Lafayette, Louisiana 70504 June 23, 2010. RockSat Objectives.
L a f a y e t t e
Dr. Andy Hollerman
Department of Physics
University of Louisiana at Lafayette
Lafayette, Louisiana 70504
June 23, 2010
Dead Time : The minimum time between detectable pulses will be less than the recovery time. This is the pulse resolving time.
Non-paralyzable dead-time: is defined as an event that occurs during this period is not counted nor does it influence the ability of the tube to respond to later events.
Paralyzable dead time (resolve time): is the time duration between the end of the non-paralyzable dead time and a resolving point at which a pulse larger than the discriminator level can be developed.
A split radiation source is nothing more than a radioactive source that is split into two pieces.
The source as a hole is considered to be the combined sources of N1 and N2 therefore I will call it NC . N1 is the left side of the split source for me; making N2 the right side of NC.
Counts are taken from N1,N2, andNC sources with the same time duration. Then the dead time of the system can be calculated by
I made my own split source with some Uranyl Acetate that was laying around which happens to contain Uranium 238! =o)
We have already milled the platforms. Also all structure hardware (standoffs, bolts/nuts) has been received.
Air tight chamber for static port
Also have Polyethylene tubing (1/4’’ x .170’’ x 25 ft) fitted with a ¼’’ OD x ¼” NPT connector.
The average off the shelf Marshmallow is a foam object with closed wall air cells within the foam.
By placing a Marshmallow in a Vacuum the walls will expand with reduction of pressure; when air is allowed back into the chamber the walls collapse hence the marshmallow rapidly deflates to a shriveled state from it’s original form.
The Stay Puft Test is to demonstrate the effectiveness of the air tight containers' constructed. One marshmallow is placed inside the air tight container and then placed into the vacuum chamber along with another marshmallow.