NanoWiki stm

stm:before_take-off_check_list

Anonymous (anonymous@undisclosed.example.com) — 2007-06-12T13:30:20+00:00

Before take-off check list Check this EVERY TIME before closing the UHV chamber and bake out and cooling down. Download here PDF version: . Every time a major cool down procedure is started, the operators should print out the check list, and go through it carefully. This is STRICTLY NECESSARY, in order to avoid

stm:bell_jar

Anonymous (anonymous@undisclosed.example.com) — 2007-02-22T16:25:10+00:00

Bell Jar HOWTO STM is a surface sensitive technique, therefore proper storage of samples is a critical step before doing STM. When possible, we measure the samples in the STM right after deposition. If this is not an option, the samples can be stored in the glass bell jar chamber, under vacuum or controlled ambient.

stm:blog

Anonymous (anonymous@undisclosed.example.com) — 2007-01-03T12:15:11+00:00

STM Blog (This is a kind of logbook page. You can report daily progress, if you find it relevant for the STM users) 03-02-2006 The RHK SPM 1000 Rev.8E control electronics has been modified in order to reduce the output XYZ, XYZ-offsets voltages from +/- 215V to +/- 140V. This has been done in order to protect scanning tubes thinner than 1mm from being depoled by too high voltages. All the details will be soon uploaded under the RHK electronics wiki page.

stm:blog_uhv_stm

Anonymous (anonymous@undisclosed.example.com) — 2015-09-16T14:39:23+00:00

UHV STM Blog & News Blog here relevant events and changes. Use format: date Content of the report. 05-2007 During the first “real attempt” to change sample with the wobble stick, the sample holder-holder comes loose from the piezo-stack. Repaired tip and sample holders, as also the tip holder came loose by hand. Apparently they were both not glued well (white stycast was used before). Used EpoTek H70E this time (thermally conducting, electrically insulating 1:1 two component epoxy).

stm:calibrations

Anonymous (anonymous@undisclosed.example.com) — 2006-02-06T12:59:33+00:00

Calibrations * Calibration of Pt1000 thermometer (2K-300K) PPMS, 15-09-2006. Download: * Calibration of Pt1000 thermometer (10K-300K) From Frossati. Download:

stm:cryostat_doc

Anonymous (anonymous@undisclosed.example.com) — 2007-04-05T13:09:05+00:00

Cryostat doc Documentation about the Green Cryostat (Stainless Steel Gas Flow Cryostat fromCryogenic Limited) Safety and Precautions First time cooling procedure Warming up procedure (i.e. warming the whole system to RT) Filling N2 and He tanks VTI Insert (Manual from factory) Magnet (Manual from factory) Manual setting of the magnetic field (Step by step checklist for energizing the coil)

stm:federica_stm

Anonymous (anonymous@undisclosed.example.com) — 2007-04-17T12:56:18+00:00

Federica STM Upload here all the relevant data and documentation about the large STM with XY stage and scanner embedded in the Z-motor. STM main purpose: to study nano-meso-micron-structured oxides/superconductors/heterostructures) Images Electrical connections

stm:filling_n2_and_he_tanks

Anonymous (anonymous@undisclosed.example.com) — 2006-02-20T17:47:21+00:00

Filling the N2 and He tanks Liquid Nitrogen To fill the nitrogen tank: - connect a LN2 transfer tube to a LN2 storage dewer and insert the other end 40-50 cm deep inside the tank hole. - pressurise the dewer till at least 500 mbar and slowly open the valve so that the liquid starts to flow. Then when the transfer tube is nicely solid and frozen, start to fill faster by opening the valve further.

stm:first_time_cooling_procedure

Anonymous (anonymous@undisclosed.example.com) — 2006-04-24T12:45:57+00:00

First time cooling procedure Description: the procedure consists in evacuating the insulations between the tanks and the outer world and the tanks and the VTI. After flushing the needle valves and the capillaries with dry Helium, liquid Nitrogen can be poored into the Helium bath and left there to precool for 1 night. The liquid Nitrogen should be completely expelled and then liquid Helium transfer can start.

stm:he3-uhv-stm_warming_up_procedure

Anonymous (anonymous@undisclosed.example.com) — 2009-05-18T13:21:38+00:00

He3-UHV-STM warming up procedure Procedures are very similar to the ones for the VTI STM. * Ground the piezos (switch to “OFF” on the box). * Open V1 * Close 1K-NV (0%) and switch pumping line from pump to helium recovery. * Close UHV-sock NV (do not close the needle valve hard!) and switch pumping line from pump to helium recovery.

stm:jeol_jspm-4500a

Anonymous (anonymous@undisclosed.example.com) — 2016-03-04T08:37:52+00:00

Jeol JSPM-4500A The STM is a UHV SPM microscope that combines a AFM with a STM and currently has a base pressure of approximately 2·10^-8 mbar. It is equipped with a RHK R9 controller with a supplied Mathbox from RHK and a Femto Preamplifier. In the current configuration as of 2016-02-25, it has capabilities for Argon sputtering, evaporation by Knudsen cell, annealing by button heater. The AFM has not been used in a few years and, nor has the LEED.

stm:logbook

Anonymous (anonymous@undisclosed.example.com) — 2007-01-29T18:05:20+00:00

Logbooks Download here () template for printed logbook. It is very important to keep a rigorous logbook for every measurement ()and for any maintenance action (), either on the STM or on the cryostat. A notebook is provided, to make notes. Nevertheless NEVER FORGET to fill in the above provided template AND the below more schematic logbook.

stm:logbook_uhv_stm

Anonymous (anonymous@undisclosed.example.com) — 2009-05-18T08:23:46+00:00

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.

stm:manuals_general

Anonymous (anonymous@undisclosed.example.com) — 2011-03-21T17:00:31+00:00

8-) Marius, only serious stuff here, no smileys ;-pppp !!!

stm:manual_cryostat

Anonymous (anonymous@undisclosed.example.com) — 2009-05-18T12:36:54+00:00

Un-official Manual of Heliox_UHV (cryostat and 300mK fridge) First cooling down The first cooling down requires to have the superinsulation (or Outer Vacuum Chamber -OVC-) well pumped. Then the magnet/helium tank are pre-cooled to liquid nitrogen temperature at the same time together with the (outer) nitrogen tank. After 1 night the nitrogen can be expelled from the helium tank and the latter can be refilled with liquid helium. Here under the procedure is described in details:

stm:manual_magnet

Anonymous (anonymous@undisclosed.example.com) — 2009-05-19T09:48:23+00:00

Manual Magnet Magnet specs Power supply short howto (model PS120)

stm:manual_setting_of_the_magnetic_field

Anonymous (anonymous@undisclosed.example.com) — 2007-01-29T18:01:28+00:00

Manual Setting of the Magnetic Field Driven Mode Advantage: faster field sweeps. Disadvantage: helium consupmtion and noise increased. * Superconducting switch HEATER ON. Wait 1 minute. * Select right MID set point with SELECT on keypad. * Press MID toggle button.

stm:manual_stm

Anonymous (anonymous@undisclosed.example.com) — 2009-05-18T13:06:23+00:00

Manual STM Connector scheme Coarse approach working principle COARSE APPROACH: This STM employs a compact design where the Z-coarse (a slip-stick motor, 6 piezo stacks driven at the same time with the same waveform) and Z-fine motion of the tip is done by the same set of (shear) piezos. The same HV amplifier is used for Z-coarse and Z-fine. This means that the available voltage range has/can to be reserved for the Z-coarse and Z-fine motion, as depicted in the figure here under:

stm:march_16_revolution

Anonymous (anonymous@undisclosed.example.com) — 2016-03-04T09:31:01+00:00

March 2016 revolution High priority issues Issues in this category are such that they affect the essential functionality of the instrument. * AFM is not working. RHK staff has maintained there is some issue with the optics, first the laser amplifier was not working and then it was the photodiode. The photodiode was troubleshoot in the end of February 2016 and was indeed disconnected in at least one quadrant. Bert has been notified about this and it should be rectified during the March revol…

stm:measurement_procedure

Anonymous (anonymous@undisclosed.example.com) — 2013-07-10T09:58:47+00:00

Measurement Procedure Starting point: new sample and new tip are loaded in the STM. Tip-sample distance is “large” (i.e. few millimeters). STM is in lowest position, inside the centering pin and 1K-shield-window is open. 1K pot flow is set for normal cooling operations (~6-7mbar). All 3He is inside the system and V1 is

stm:pre-amplifiers_specs_and_characterizations

Anonymous (anonymous@undisclosed.example.com) — 2007-04-17T09:41:12+00:00

Pre-amplifiers specs and characterizations Upload here the specs, modifications and characterizations of the pre-amps. * (RHK) STM 100, labelled “Vortex” Modified 1 stage RHK pre-amp. Gain: 10^10 V/A, bandwidth=1 kHz Specs: downlaod: * (RHK) STM 100, labelled

stm:results

Anonymous (anonymous@undisclosed.example.com) — 2006-02-06T19:23:45+00:00

Results Results..... 06-02-2006 See blog entry on this date, for first “flat” Au imaging at RT.

stm:rhk_doc

Anonymous (anonymous@undisclosed.example.com) — 2006-09-08T08:57:08+00:00

RHK doc Documentation about the RHK control electronics and software. SPM 100 rev. 8E SPM32 for win98 XPMPro for winXP STM 100 rev.

stm:safety_and_precautions

Anonymous (anonymous@undisclosed.example.com) — 2006-03-22T10:05:20+00:00

Safety and Precautions * Use protective gloves when handling cryogenic liquids. * Be sure that you've been told by someone IN CHARGE how to handle cryogenic liquids. * Never power up the magnet if the He level meter (HLG200) indicates 300mm or less.

stm:sample_scheme_in_the_book-shelf

Anonymous (anonymous@undisclosed.example.com) — 2009-05-19T11:27:33+00:00

Date User Name UHV Pressure 19-02-2007Federica6.3 10-8 Sander's tip MoGe/Au(50nm) ----- ----- -----?? sample L429 :!: ----- -----My Tip Nb:STO ----- ----- ----- ---------- Date User Name UHV Pressure 26-02-2007

stm:sample_scheme_in_the_train

Anonymous (anonymous@undisclosed.example.com) — 2009-05-19T11:27:03+00:00

Date User Name UHV Pressure before (mbar) UHV pressure after (mbar) 16-02-2007Federica6.3 10-81.4 10-6 Nb:STOL429 Sander's tipMy tipMoGe/Au(50nm) ---------- Date User Name UHV Pressure before (mbar) UHV pressure after (mbar) 23-02-2007Federica

stm:simon_stm

Anonymous (anonymous@undisclosed.example.com) — 2006-02-06T10:38:34+00:00

Simon STM Under Construction :-) Meant to replace the old Vortex STM.

stm:software

Anonymous (anonymous@undisclosed.example.com) — 2011-04-15T14:44:54+00:00

Software LabView Software for Atomic Chains: Matlab Code for analysing SM3 and SM4 generated by RHK: * Matlab Code: * Matlab Scripts: * Matlab scripts coarse approach:

stm:spm32_for_win98

Anonymous (anonymous@undisclosed.example.com) — 2006-09-08T09:20:22+00:00

SPM32 Manual

stm:stm

Anonymous (anonymous@undisclosed.example.com) — 2016-02-26T15:51:47+00:00

MSM STM Wiki Page Wiki of the Low Temperature Scanning Tunneling Microscope of the MSM Group. Here you can find the relevant documentation about the low temperature STM(s) located in HL-629. Calibrations and all the important changes done to the STM facilities (STM heads, STM control electronics, STM inserts (wirings etc) and cryostat) should be logged here.

stm:tuning_fork_afm

Anonymous (anonymous@undisclosed.example.com) — 2006-02-06T10:39:38+00:00

Tuning Fork STM Under heavy development :-) Ultimate atomic resolution even on cheese :-)

stm:uhv_he3_stm

Anonymous (anonymous@undisclosed.example.com) — 2011-04-15T13:02:24+00:00

UHV He3 STM This is the Wiki page of the MSM/AMC UHV He3 STM. Blog UHV STM Logbook UHV STM Sample scheme in the train Sample scheme in the book-shelf Before take-off check list Manual Cryostat He3-UHV-STM Warming up procedure Manual Magnet Various Documentation Manual STM Measurement Procedure Software

stm:various_documentation

Anonymous (anonymous@undisclosed.example.com) — 2011-06-30T09:59:37+00:00

Various Documentation Group presentation June 2011: Characterization measurements februari 2011: Old-BNC-piezo-box: Button Heater: Calculation of sputtering rate with Specs Ion Gun: Au <110> treatment: DAQ 16XE10 manual: Exp_Techniques2009_Student_presentations:

stm:vortex_stm_old

Anonymous (anonymous@undisclosed.example.com) — 2007-01-26T10:11:42+00:00

Vortex STM (old) Upload here the relevant data and documentation about the small old STM built by Alexei Troyanovsky (used by G. van Baarle) for vortex imaging in the He storage vessel. Update (august 2005): STM dies. Coarse approach connection to 1 piezo is broken and cannot be repaired without building a complete new coarse approach module. We decide to build a new STM for the small magnet.

stm:warming_up_procedure

Anonymous (anonymous@undisclosed.example.com) — 2007-04-05T13:28:43+00:00

Warming up the entire cryostat to room temperature That's rather simple: just stop filling the helium tank and the nitrogen tank. The system will warm up by itself in about 3 days. You can follow the warming up by checking the two thermometers (VTI-bottom and λ-plate, T1 and T2). 7Ω is nitrogen temperature, 19Ω about 150K, 28Ω is 300K.

stm:xpmpro_for_winxp

Anonymous (anonymous@undisclosed.example.com) — 2006-09-08T09:00:26+00:00

XPMPro Manual