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tgpmt [2016/11/21 20:12]
vik
tgpmt [2019/04/30 19:40] (current)
vik
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 +====== PMT-200 ======
 +PMT-200 (sometimes also referred as TGPMT ) card is part of the Tiger Controller that lets user power and interface with two Photo Multiplier Tube (PMT). ​
  
 +===== Features =====
 +  * High Sensitivity
 +  * Controls up to 2 PMTs
 +  * Manual or Programmable PMT Gain
 +  * Automatic overexposure shutdown ​
 +  * C-mount fits most camera ports
 +  * Wide Dynamic Range
 +  * Easy to Use
 +
 +===== Supported PMT =====
 +
 +The PMT-200 is compatible with Hamamatsu'​s ​ Voltage Output PMT modules like, [[https://​www.dropbox.com/​s/​jvncddqrqdvaukq/​h5784.pdf?​dl=0|H5784]],​ [[https://​www.hamamatsu.com/​us/​en/​product/​alpha/​P/​3003/​3045/​H10722-01/​index.html|H10722]] , H10723 and others.
 +
 +[{{ ham_pmt_devices.png?​direct&​600 |List of PMT modules compatible with PMT-200. Excerpt from [[https://​www.hamamatsu.com/​resources/​pdf/​etd/​PMTmodules_TPMO0010E.pdf|Hamamatsu'​s PMT catalog]]}}]
 +
 +
 +
 +Note: Contact ASI if your preferred PMT isn't shown above. We will be happy to look into it.
 +
 +===== Precautions when handling PMT =====
 +A Photo Multiplier tube(PMT) is a very sensitive instrument. Great care must be taken when handling and using it. Please read the PMT manufacture'​s notes on Safety precautions and Handling instructions before using the PMT. Below are excerpts from [[https://​www.hamamatsu.com/​resources/​pdf/​etd/​PMTmodules_TPMO0010E.pdf|Hamamatsu'​s PMT catalog]].
 +
 +  * Do Not expose the photocathode of the PMT module to excessive light such as sunlight. If exposed, noise will increase and photocathode sensitivity will deteriorate.
 +  * Do not touch the light input window with bare hands, Dirt and grime on the window causes loss of optical transmittance. If the window becomes soiled with dirt or grime, wipe it clean using alcohol.
 +  * Helium will penetrate through silica(quartz) glass windows and increase noise. Avoid using or storing those PMT modules in an atmosphere where helium is present.
 +  * Do not apply strong vibrations or impacts to PMT modules.
 +  * Do not let moisture or dust penetrate inside.
 +  * Do not hotplug the PMT into PMT-200 card. 
 +
 +===== Configuring PMT-200 to operate with 15V or 5V PMTs =====
 +
 +Some PMT modules like H10722 operate with +/- 5Volts, and others like H9306 operate with +/- 15Volts. PMT-200 is compatible with both PMTs, however it needs to be configured with Jumper to provide the necessary voltage to the PMTs. 
 +
 +Note the configuration is card wide and applies to both channels. Two PMTs with different input voltages cannot be used with the PMT-200 card at the same time. 
 +
 +== 5V Configuration ==
 +
 +This Configuration is for [[https://​www.hamamatsu.com/​us/​en/​product/​alpha/​P/​3003/​3045/​H10722-01/​index.html|H10722]] , H10723, H11462 and other PMT series. ​
 +
 +The Blue Jumpers stay the same between configurations . The Pink Jumpers apply to +/- 5 Volt configuration. They are
 +
 +  * JP5 and JP6 with 2-3 pins jumpered
 +  * JP1 and JP2 with 1-2 pins jumpered
 +
 +[{{ 5v_tgpmt.png?​direct&​300 |Click to Enlarge}}] ​
 +
 +== 15V Configuration ==
 +
 +This configuration is for [[https://​www.dropbox.com/​s/​jvncddqrqdvaukq/​h5784.pdf?​dl=0|H5784]],​ H7827 , H10492 , H10493 and others PMT series.  ​
 +
 +<WRAP center round info 60%>
 +Not always true, if the PMT has a 7-pin HiRose connector its more likely a H5784 PMT
 +</​WRAP>​
 +
 +
 +The Blue Jumpers stay the same between configurations . The Red Jumpers apply to +/- 15 Volt configuration. They are
 +
 +  * JP5 and JP6 with 1-2 pins jumpered
 +  * JP1 and JP2 with 2-3 pins jumpered
 +
 +[{{ 15v_tgpmt.png?​direct&​300 |Click to Enlarge}}] ​
 +
 +===== Operation =====
 +
 +==== Panel Indicators, knobs and connector ====
 +
 +{{ pmt_panel_connectors.jpg?​direct&​300 |}}
 +
 +==== Connections ====
 +
 +[{{ pmt_rj45.jpg?​direct&​300 |[[https://​en.wikipedia.org/​wiki/​TIA/​EIA-568|RJ45 Ethernet cable in EIA-568B confg]]}}]
 +
 +PMT-200 connects to the PMT tubes thru a [[https://​en.wikipedia.org/​wiki/​TIA/​EIA-568|RJ45 Ethernet cable in EIA-568B configuration]]. This is common cable used in IT/​networking. If your cable is malfunctioning or misplaced, in a pinch a common ethernet cable could be used instead. If in doubt contact ASI for a replacement. ​
 +
 +[{{ pmt_connected.jpg?​direct&​300 |TGPMT card shown connected to two PMTs}}]
 +
 +<WRAP center round important 60%>
 +The connector on the PMT and PMT-200 are **NOT** ethernet connector. They are wired in a different manner. Connecting anything other than a PMT to the PMT-200, or vice-versa will cause damage and failure. ​
 +</​WRAP>​
 +
 +==== Connector Pinout ====
 + 
 +
 +^RJ45 Pin ^Desp ^
 +|1|V+ to PMT (+5V or +15V)|
 +|2|GROUND|
 +|3|V- to PMT (-5V or -15V)|
 +|4|Gain set voltage to PMT (upto 1V)|
 +|5|GROUND|
 +|6|VREF from PMT (+1.2V)|
 +|7|Signal from PMT|
 +|8|GROUND|
 +
 +===== Automatic overexposure shutdown(Overload) =====
 +
 +The PMT-200 has an electronics mechanism where if the PMT output signal reaches 80% of the maximum output voltage, it shuts off the PMT by setting the Gain control voltage to 0 Volts. This mechanism helps protect the PMT from excessive light which deteriorates the photocathode'​s sensitivity. ​
 +
 +PMT-200 indicates the overload state with the Faceplate LED going from Green to red, and the [[commands:​lock|[addr#​]LOCK X? Y?]] queries return a **0**. ​
 +
 +Before the user attempts to [[tgpmt#​overload_state_reset|recover from overload]] state. They should check if the PMT is exposed to excessive light, or turn down the PMT [[tgpmt#​gain|Gain]] so that the photocathode is not over stimulated. ​
 +
 +{{ pmt_panel_overloaded.jpg?​direct&​300 |}}
 +
 +{{ overload_known_issue.jpg?​direct&​300 |}}
 +
 +===== Controlling the Card =====
 +
 +The PMT-200 can be controlled manually or thru serial command.
 +
 +==== Gain ====
 +PMT gain can be set manually by adjusting the Dial or with [[commands:​wrdac|WRDAC command]]. There is no switch to pick your prefered control method , instead a OR function is used. So if you prefer serial command control to set gain , make sure Dial is set to 0. Vice-Versa , if you prefer dial to control the gain , set [[commands:​wrdac|[addr#​]WRDAC X=0 Y=0]].
 +
 +The dial or the command adjust a control voltage to the PMT. This changes the high voltage applied to the Photomultiplier tube that changes the ratio of anode output current to cathode output current ie Gain. 
 +
 +Note: Over stimulating the PMT with high gain over extended period of time will lead to decrease in PMT's sensitivity. ​
 +
 +==== Overload state Reset ====
 +
 +When PMT overloads , it can recovered manually by pressing the Overload Reset button or by issuing the [[commands:​lock|LOCK X Y reset]] command.
 +
 +
 +
 +==== PMT Signal ====
 +
 +The PMTs signal can be read as a 0-4V analog signal or can be queried with a [[commands:​rdadc|RDADC]] serial command which reads it from an ADC on board the PMT card. 
 +
 +The PMT signal out of the PMT-200 has a 50ohm output impedance. When driving a load with 50ohm input impedance , expect **×½** gain.
 +
 +
 +
 +===== ADC Specification =====
 +
 +
 +
 +  * ADC resolution is 10bits, PMT signal is represented as a integer between 0 and 1024
 +  * ADC can be read with [[commands:​rdadc|RDADC command]].
 +  * Signal is sampled every 500usec or 2kHz
 +  * Controller can average the ADC reading with a Simple Moving Average routine. Sample size can be 0(ie average is disabled) to 32 .Sample size of the average can be set with the [[commands:​error|ERROR]] command. ​
 +  * User can Zero the ADC reading (subtract background) with the [[commands:​here|HERE]] serial command.
 +
 +
 +
 +
 +===== Serial Command =====
 +Serial commands which control function on PMT-200:
 +{{topic>​commands +tgpmt}}
 +
 +===== MicroManager Support =====
 +
 +PMT-200 is supported by MicroManager ​ 1.4.23 and above  . It can be found as part of the ASITiger Device Plugin , and is classed as a [[https://​valelab.ucsf.edu/​~MM/​doc/​MMDevice/​html/​class_m_m_1_1_signal_i_o.html|SignalIO device]]. ​
 +
 +Each PMT-200 card supports upto two PMTs, MicroManager automatically detects this and defines them as two separate SignalIO devices. ​
 +
 +Below is a brief description of the device functions and properties,
 +
 +== Device Member Functions ==
 +
 +''​GetSignal(double&​ volts)''​ , Used to Query the ADC reading form the PMT. Same function as [[commands:​rdadc|RDADC]] serial command. The readings are in ADC counts and not in voltage. Refer to [[tgpmt#​adc_specification|ADC Spec]] for more info.
 +
 +''​GetLimits(double&​ minVolts, double& maxVolts)''​ , Use to query the device for maximum and minimum values that can be returned.  ​
 +
 +''​SetSignal(double volts)'',​ Not relevent for a PMT , hence not implemented. ​
 +
 +''​GetGateOpen(bool&​ open)'',​ when a PMT is exposed to excessive light , PMT-200 triggers an overload state which shuts the PMT off. More info on Overload[[tgpmt#​automatic_overexposure_shutdown_overload| is here]]. This function can be used to query the PMTs current state. Returns **True** when PMT is enabled or working. **False** when PMT is overloaded and disabled. Same function as [[commands:​lock|LOCK]] serial command. ​
 +
 +''​SetGateOpen(bool open)''​ , this function can be used to try reset the PMTs overload state. **True** attempts to Reset the overload state. **False** performs no action. Same function as [[commands:​lock|LOCK]] serial command. More info [[tgpmt#​Overload_state_Reset|Overload state reset is here]] ​
 +
 +== Device Member Properties ==
 +
 +''​ADC Averaging Size'',​ View and set the PMT-200 ADC Simple Moving Average routine'​s sample size. Same function as [[commands:​error|ERROR serial command]]. Refer to [[tgpmt#​adc_specification|ADC spec]] for more info. This is a card wise settings , so changing this property for one PMT will also change it for another PMT that shares the same card. 
 +
 +''​PMT Gain'',​ View and set the PMT's Gain. Serves the same function as [[commands:​wrdac|WRADC serial command]]. More info on [[tgpmt#​gain|Gain is here]]. ​
 +
 +''​PMT Overloaded'',​ a read only property with a **Yes** or **No** state , to indicate if the PMT is Overloaded or not. More info on Overload[[tgpmt#​automatic_overexposure_shutdown_overload| is here]] . Same function as [[commands:​lock|LOCK]] serial command. ​
 +
 +''​PMT Signal'',​ a read only property that shows the ADC reading of the PMT. Same function as [[commands:​rdadc|RDADC]] serial command.
 +
 +''​PMT Overload Reset'',​ a write only property that lets the user try reset the PMT's overload state. Possible states are **OFF** (default) , **ON** which immediately applies the Reset pulse, and then changes to **RESET applied** state. More info on [[tgpmt#​Overload_state_Reset|Overload state reset is here]] ​
 +
 +''​SaveCardSettings'',​ a write only property , which lets the user save the current settings into the PMT-200 cards'​s memory , or restore everything to factory defaults. ​
 +
 +{{tag>​tiger tgpmt manual micromanager}}
Address: 29391 W Enid Rd. Eugene, OR 97402, USA | Phone: +1 (541) 461-8181