1. UTA Large Perpetual Cloud Chamber Liquid Supply and Circulation Layne Price

2. Introduction Liquid Supply and Circulation Group: Jessica Jette, Daniel Thomas, Layne Price Work closely in tandem with structural design group

3. Basic Idea for the LPCC Charged particles enter a super-cooled isopropyl alcohol vapor forming droplets along the particle’s trajectory, leaving a visible trace This visible track can then be taken as evidence for the entrance of these charged particles into the chamber

4. Motivation To design a perpetual cloud chamber with joint input from the physics and chemistry students This would be the largest such chamber in existence Display the chamber in the CPB foyer in order to stimulate interest in physics, and in particular high energy particles Could be used for both instruction and laboratory measurement

5. Design Requirements and Considerations Develop a perpetual system that both supplies the cloud chamber with enough alcohol to operate and circulates the liquid so that alcohol will rarely have to be input into the chamber 4-part design: Supply Reservoir, Heat Bath and Pump System, Jets, Alcohol Exit Mechanism

6. Final Design 1 2 4 3

7. 1.Isopropyl Alcohol Reservoir Large, well insulated, plastic reservoir Will hold all the alcohol necessary for perpetual operation of the LPCC Timed valve

8. 2.Heat Bath and Pump System Second reservoir that acts as a heat bath Heat the alcohol to promote faster evaporation rate Electrically operated heating coils and pump T-connection Second timed valve Set, controlled alcohol level

9. 3.Liquid Ejection onto the Evaporation Troughs Series of T-connections that attach to 180 degree alcohol misters Eject the alcohol onto the felt balls in the chamber’s evaporation trough

10. 4.Chamber Exit Mechanism Angled trench at edge of chamber’s bottom Alcohol condensation will slowly disperse along the bottom of the chamber to these trenches Alcohol will return to the supply reservoir to circulate again

11. Test and Functionality Supply Reservoir –Simple to build, no foreseeable problem –Operates by gravity—must be higher than heat bath –Yet to determine necessary volume and time interval for final design

12. Tests and Functionality Heat Bath and Pump System –Heat bath is the biggest unknown, yet to be built –The pump system, with timed valve, has been built and works well –Again need to determine necessary volume and time interval for final chamber

13. Tests and Functionality Liquid Ejection onto the Evaporation Troughs –System works well –Need structural design team to mount and insert the tubing onto the chamber

14. Tests and Functionality Chamber Exit Mechanism –Has not been built, has not been tested –Need to build onto the structural bottom of the chamber –We have yet to get with structural design team to manufacture the trench system

15. Conclusion The system should work fairly well with foreseeably only minor problems UNLESS the exit mechanism doesn’t work Some time will need to be put into determining exact volumes necessary for operation and the corresponding timed intervals for the valves The system would seem to be able to supply the alcohol into the chamber without incident