Physics307L:People/Knockel/Notebook/070926: Difference between revisions
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==Goal== | ==Goal== | ||
GOOALLLL!!!!! We win!!! | |||
==Equipment== | ==Equipment== | ||
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*banana plugs | *banana plugs | ||
*The Device! | *The Device! | ||
**Helmholtz | **Helmholtz coil | ||
**Vacuum tube with helium gas and electron gun inside | **Vacuum tube with helium gas and electron gun inside | ||
**Mirror with ticks for measuring length | **Mirror with ticks for measuring length | ||
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*plugged in the three power supplies into the wall and the two multimeters | *plugged in the three power supplies into the wall and the two multimeters | ||
*connected one of the weak power supplies into the heater for the electron gun with banana plugs and turned it on not exceeding 6.3V | *connected one of the weak power supplies into the heater for the electron gun with banana plugs and turned it on not exceeding 6.3V | ||
*plugged in the other weak power supply into the Helmholtz | *plugged in the other weak power supply into the Helmholtz coil using banana plugs, but intercepted the circuit to connect a multimeter in series to measure current, and then turned on the power to the Helmholtz coil and multimeter so there were about 2 amps flowing | ||
*plugged in the large power supply to power the electrodes of the electron gun using banana plugs, and turned it on so that about 300V are applied | *plugged in the large power supply to power the electrodes of the electron gun using banana plugs, and turned it on so that about 300V are applied | ||
*connected a multimeter to | *connected a multimeter to The Device! to measure voltage across electrodes | ||
===To adjust the electron beam I...=== | ===To adjust the electron beam I...=== | ||
#turned off lights | #turned off lights | ||
| Line 31: | Line 32: | ||
==My Procedure== | ==My Procedure== | ||
I sat on my ass and took some sample data. | I sat on my ass and took some sample data. When I do the real procedure I'll tell about it here | ||
Revision as of 15:18, 26 September 2007
Electron's e/m Ratio
Experimentalists: Nik, where are you?
Goal
GOOALLLL!!!!! We win!!!
Equipment
- 2 weak direct current power supplies (10V and 2A are the max outputs needed)
- 1 strong direct current power supply (500V needed)
- 2 multimeters
- banana plugs
- The Device!
- Helmholtz coil
- Vacuum tube with helium gas and electron gun inside
- Mirror with ticks for measuring length
- Black covering to block out light
Setup
To plug everything in I...
- acquired The Device!
- plugged in the three power supplies into the wall and the two multimeters
- connected one of the weak power supplies into the heater for the electron gun with banana plugs and turned it on not exceeding 6.3V
- plugged in the other weak power supply into the Helmholtz coil using banana plugs, but intercepted the circuit to connect a multimeter in series to measure current, and then turned on the power to the Helmholtz coil and multimeter so there were about 2 amps flowing
- plugged in the large power supply to power the electrodes of the electron gun using banana plugs, and turned it on so that about 300V are applied
- connected a multimeter to The Device! to measure voltage across electrodes
To adjust the electron beam I...
- turned off lights
- waited for heater to heat up
- adjusted voltage to electrodes and current to Helmholtz coils so that the beam made a heliz
- rotated the vacuum tube so the helix became a circle
My Procedure
I sat on my ass and took some sample data. When I do the real procedure I'll tell about it here
