====== 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 |0-5.5|19-12-2008| Very successful run: 1. worked for 2 months between 0.3 and 2K. 2. Measured MoGe, NbGe gaps. Imaged vortices in both. Observed ZBP in YBCO, in filed too up to 5T :-) |
|S-STM|federica+simon|22-01-2009|--|--| YBCO on STO, H-HOPG, PdFe/Nb | 0.3K-2K|2.5 x 10-10 | 0-8|29-04-2009 |Very successful run ends after 3 months because of problems with the coarse approach - TiC coating of the slider is completely worn after 1.5 yrs of continuous usage... ;-) 8-)|
|s-STM|federica+simon|13-05-2009|--|--| | | | | | |