HAL Pre-Lab
INCLUDE THIS SHEET AS THE FIRST PAGE OF YOUR REPORT.
Student's Name: ______________________________________________________________
Partner's Name: ______________________________________________________________
Before the 1st Day of Lab
Pre-lab Discussion Questions
It is your responsibility to discuss this lab with an instructor before your first day of your scheduled lab period. This signed sheet must be included as the first page of your report. Without it you will lose grade points. You should be prepared to discuss at least the following before you come to lab:
- What is the Hall Effect? Why do we examine the Hall Effect using plasma instead of a piece of metal?
- What does it mean to say that the plasma has a temperature? If the temperature is so high, why doesn’t the glass tube melt?
- What plasma parameters are you going to determine, and what measurements must you make besides the Hall voltage? To put another way, what are the relationships between what you measure and what you are going to calculate? For example, how do you get from a measurement of Hall voltage to a value of the electron density? Work out all these relationships now. Otherwise you might neglect to measure some relevant quantities.
- Approximately what potential do we apply across the tube to get a glow discharge?
- Why don’t we use a DVMM to measure the relevant voltages?.
Staff Signature ______________________________________________ Date ____________
Completed on before the first day of lab? (circle) Yes / No
Mid-lab Questions
On day 4 of this lab, you should have successfully produced a plot of EH vs B for at least one discharge-tube pressure value. Show it to a GSI and ask for a signature.
Staff Signature ______________________________________________ Date ____________
Completed on the fourth day of lab? (circle) Yes / No