part 1
| priority | status | subsystem | type | current model | problem with current device | requirements/parameters | function | to do | possible options | comment | ports |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | prep chamber – sample heater | current source | Topward TPS4000 | no PC connectivity | DC 30V 3A | sample heating | replace | KORAD KD3005P / driver for CAMELS exists https://botland.store/laboratory-power-supply/5496-laboratory-power-supply-korad-kd3005p-0-30v-5a-usb-5907558240610.html | serial, usb | ||
| 1 | prep chamber – sample heater | thermometer | Testo 635 | no PC connectivity | unknown thermocouple installed | sample T readout | Calibration? Replace with multimeter? | replace with ADC with ethernet port: https://controlbyweb.com/x418/ | Almost certainly TE Type K thermocouple (NiCr-Ni) https://www.pyromation.com/downloads/data/emfk_c.pdf - not quite linear, dV/dT close to 41uV/deg | ||
| 4 | prep chamber – sample heater | ammeter | generic handheld | no PC connectivity | DC 3A | heating current readout | not needed if source is good | ignore? | |||
| 2 | prep chamber – safety | ammeter | generic handheld | no PC connectivity | DC 2mA limit | current to ground readout | replace | 1kOhm // 2 diods // ADC ? - ask if resistance is a problem | |||
| 4 | prep chamber – pumping unit | current source | generic old | no PC connectivity | DC 30V 120mA | SECUVAC valve | doesn’t have to be controlled remotely | ignore | |||
| 1 | prep chamber – pumping unit | pressure gauge | combivac IT23 | screen semi-broken | prep ch pressure readout | connect to PC (ethernet and serial port are present) | serial, ethernet | ||||
| 3 | --\--\-- | replace because of screen |
part 2
| priority | status | subsystem | type | current model | problem with current device | requirements/parameters | function | to do | possible options | comment | ports |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | spm chamber – pumping unit | pressure gauge | Gamma vacuum 4/2/6/p | ok | stm ch pressure readout | connect to PC (ethernet and serial port are present) | might be useful for driver - not quite the right model though: https://www.tspi.at/2021/08/17/gammaionpumpcontrollerethernet.html#read-pressure-0x0b | serial, ethernet | |||
| 2 | transfer chamber? – pumping unit | pressure gauge | center one | ok | connect to PC (ethernet and serial port are present) | serial, ethernet | |||||
| 4 | spm chamber – cryogenic unit | LHe level meter | CryoVac Helium Depth Indicator | slow mode not used? | LHe level meter | connect to PC (serial port is present) | serial | ||||
| 1 | prep chamber – argon sputterer | power source | CHI-VAC ???? | no PC connectivity | DCV 2kV and DCI 50mA and focus? | sputterer control | find manual. Replace? Talk to it somehow? | 2kV power source https://www.esdemc.com/products/hv-supply-solutions/2kv-high-voltage-supply-module/ . Replace 50mA with KORAD (see above). Keep using "Focus" from original - does not have to be controlled | no digital parts at all - either find a replacement (might be difficult) or replace controllers via pyboard/... - 2xpotentiometers + a few switches + milliammeter | ||
| 1 | prep chamber – argon sputterer | valve | mechanical valve | manual only | ??? needle valve | let argon into prep ch | replace with electric valve / find a way to control | the only motorized leak valve i have found so far https://www.vatvalve.com/series/ultra-high-vacuum-all-metal-variable-leak-valve/59024-GEGG - very expensive (7.5k + taxes, delivery, ..) | https://www.chi-vac.com/QW_Product/ENProductDetail?ProductId=28&FirstTypeId=3&flag=2 | ||
| 1 | prep chamber – evaporator | power source | CHI-VAC ???? | no PC connectivity | ???? with PID | evaporation control | find manual. Replace? Talk to it somehow? | Replace with KORAD + thermometry via ADC? | at least partially controllable via RS485 | RS485 (?) | |
| 4 | chamber separation | valve | mechanical valve | manual only | ??? | separation of the chambers | replace with electric valve / find a way to control |
Potential cheap solution for leak valve / needle valve: existing valve + stepper motor + USB control unit + power supply + mechanical parts. Cheap (approx 200 euro + mechanical parts), open source drivers exist (not for CAMELS, but should be easy enough to connect), should be relatively simple to build. Suggested options for motor: https://www.omc-stepperonline.com/nema-17-dual-shaft-stepper-motor-l-39mm-gear-ratio-50-1-high-precision-planetary-gearbox-9-5mm-rear-shaft-length-17hs15-1684d-hg50-ar3 or https://www.omc-stepperonline.com/nema-17-stepper-motor-l-40mm-gear-ratio-50-1-mg-series-planetary-gearbox-17hs15-1584s-mg50 For power supply: KORAD kd3005p, For controller: https://www.pololu.com/product/3140 For mechanical parts - same place as motors + make in the workshop here.
part 3
| priority | status | subsystem | type | current model | problem with current device | requirements/parameters | function | to do | possible options | comment | ports |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | prep chamber – PEEM | power source | Emission microscope control | software missing | see manual | main PEEM control unit | talk to Florian first, then update the entry | ||||
| 1 | prep chamber – PEEM | camera | PCO.pixelfly | ok | USB camera | PEEM camera | --\--\-- | ||||
| 1 | prep chamber – PEEM | power source | ebq 100 isolated | no PC connectivity | see manual | UV light source | --\--\-- | ||||
| 3 | spm chamber – spm | control unit | nanonis | ok | nanonis control unit |