stm:logbook_uhv_stm
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UHV He3 STM Logbook
Log here the cooldowns: Name_setup/Date-start/He-level start/He-level end/Sample/T-range/Magnetic field range/Date-end/Notes. Under “Notes” report whether He has been refilled during the cooldown. End date is defined when the sample/insert is taken out to air.
| Name STM/setup | Name Operators | Date start (dd/mm/yy) | He-start (mm) | He-end (mm) | Sample | T-range (K) | UHV pressure (mbar) | H-range (T) | Date-end (dd/mm/yy) | Notes |
|---|---|---|---|---|---|---|---|---|---|---|
| S-STM | federica | 06-02-07 | 0 | 0 | several | 300 | 6.6 10-8 | none | 18-02-07 | initial testings |
| S-STM | federica | 19-02-07 | 0 | 0 | MoGe/Au(50nm) old cap layer | 300 | 6.6 10-8 | none | 22-02-07 | further testing of the scanner. |
| S-STM | federica | 26-02-07 | 0 | 0 | MoGe/Au(50nm) 230207 | 300 | 6.6 10-8 | none | 16-03-07 | further testing. Problems with signal stability. No scanning possible. Change tip. Succeded, but when mounting the sample back the sample-holder holder comes loose! UHV have to opened again!  |
| S-STM | federica | april-07 | 0 | 0 | n.a. | 300 | A.P. | none | end may-07 | repair of sample and tip holders. “Upgrade” of the Z-motor spacers into a frame that provides mechanical stop mechanism to avoid spring deformation during tip exchange. New coarse approach “policy”, see blog. |
| S-STM | federica | 08-06-07 | 0 | 0 | several | 300-100 | 5 10-10 | none | 04-07-07 | Successfull, until problems with tip/sample transfer interrupt the run. Lowest T reached is 100K |
| S-STM | federica | beg-09-07 | – | – | several | 300-90 | 4 10-10 | 0-7 | nov-07 | successfull but still using “bad method” to change tip/sample by “grabbing” the insert using un-wanted friction between the 1K shield and the he-3 shield |
| S-STM | federica | 01-02-08 | – | – | several (LCMO) | 300-1K | 4 10-10 | 0-7 | 03-04-08 | successfull, used mostly as variable T above 90K. Condensed once. Several modifications were done to the system -before cooling, at the beginning of the year- which worked after all! (see blog) |
| S-STM | federica | 28-04-2008 | – | – | several (LCMO and MoGe) | 300-0.3 | 4 10-10 | 0-6 | 27-06-2008 | very successfull, reached 0.3 K 2 times, measured MoGe gap. Some problems with 50Hz at very low biases. |
| S-STM | federica | 08-10-2008 | – | – | MoGe,NbGe,STO/YBCO/Au | 2-0.3 | 3.5 10-10 | 0-1 | in course | in course |
stm/logbook_uhv_stm.1229014413.txt.gz · Last modified: 2008/12/11 16:53 by galli