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Table of Contents
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Cell
1.5in windows
Ron Bihler cell
Y-shaped source tube with 8 dispensers
Dispensers
- 4x Alvatec enriched 40K
- 2x Alvatec Rb
- 1x Alvatec Cs
- 1x Alvatec natural abundance K
note:
1) Alvatec dispensers work by sublimation, SAES by chemical reaction.
2) For Alvatec sources, the current necessary to reach the activation threshold is therefore pressure dependent (think PV=nRT). If we are running the dispensers in a higher pressure environment, a greater temperature - or current - will be needed to evaporate the metal.
3) Alvatec sources are cleaner than SAES sources (see pg 7 of Alvatec data sheet)
Dispenser map
Dispenser resistances
These resistances are between the dispenser lead and the center pin lead.
| Dispenser | R ($m\Omega$) | Status |
|---|---|---|
| enriched 40K #1 | 215 | Alive |
| enriched 40K #2 | 209 | Alive (but waterlogged?) |
| enriched 40K #3 | 216 | Dead |
| enriched 40K #4 | 206 | Dead |
| Rb #1 | 222 | ? |
| Rb #2 | 214 | ? |
| Cs | 206 | Dead |
| 39K | 224 | Alive |
Optics
note: take care to make sure counter-propogating beams have the same path length so that the beam profile of each is balanced.
Magnetic Gradient Coils
Measured by Mike Yee (in his thesis, pg. 38) @ I=4.64A
| Gx | 2.69G/cm | 0.58G/cm/A |
| Gy | 2.69G/cm | 0.58G/cm/A |
| Gz | 4.8G/cm | 1.03G/cm/A |
Polarization
Using the "Dylan Circular Polarization Tool" the side windows should be bright and the vertical should be bright.
Laser Power
| Date | Repump Power (before fiber) | Repump Power (after fiber) | Repump Power (before TA) | Repump Power (before final AOM) | Repump TA current | Trap Power (before fiber) | Trap Power (after fiber) | Trap Power (before TA) | Trap Power (before final AOM) | Trap TA current |
|---|---|---|---|---|---|---|---|---|---|---|
| 20/10/2009 | 300mW | 176mW | 8.75mW | 715mW | 2.14A | 300mW | 186mW | 16.4mW | 750mW | 2.22A |
| 05/11/2009 | 310mW | 14.6mW | - | 2.2A | ||||||
| 6/4/2010 | 515mW | 185mW | 9mW | 715mW | 2.14A | 340mW | 200mW | 15.8mW | 700mW | 2.20A |
