caen_hvps

integrate caen SY4527 power supply to tracker dcs Interface to control CAEN power supplies using a python wrapper to the CAEN C API

CAEN prerequisite

In order to use the CAEN power supplies it is necessary to install the CAEN HV Wrapper Library:

CAENHVWRAPPER https://www.caen.it/download/?filter=CAEN%20HV%20Wrapper%20Library You need to signup to download.

CAEN HV Wrapper is a set of ANSI C functions which allows to control CAEN devices. It contains a generic software interface independent by the Power Supply models and by the communication path used to exchange data with them.

caenlib

Detalied information can be found in CAENHVWrapper-6.3/CAENHVWrapperReadme.txt To install the necessary libraries execute:

./install.sh 

The installation copies and installs the library in /usr/lib, and installs it in the work directory.

hvps

lib/caen.py : Contains CAEN controller class. Provide low level wrapper for CAEN's c-api via Python's cdll functionality and is accessed via hvps.py

lib/hvps.py : Contains a class of objects that represent all the channels for the HVPS and provides a nicer interface to the CAEN C-wrapper and should be used for all programatic iteractions with the power supply

hvps_ctrl.py : Main interface to the control software. Handles all user interactions

hvps.cfg : CAEN HV modules can be setup automatically using a configuration file.

• Global Section : Should be defined

  • max_bias_voltage
  • max_ramp_rate : max_ramp_rate V/sec, probably want to keep this under <=50
  • default_slot (Mandatory): slot number where the boards are located

• Power supply section : Contains Mandatory informations:

  • Hostname or IP address
  • username and password
  • system_type : CAENHV_BOARD_TYPE (SY4527) for our case it should be 2
  • link_type : CAENHV_LINK_TYPE if TCP/IP then it should be 0

• Channels section: All channels must start with CH_. should be defined the following info for each channel;

  • channel_num (Mandatory)
  • chanel enable/disable (Mandatory)
  • max_bias_voltage
  • ramp_rate

Dockerfile

Create an image and Install all the necessary tools.

Running

To create an image:

docker build -t centos:caen_hvps_test .

To run the image as a container:

docker run --platform linux/amd64 -it --name=caen_hvps centos:caen_hvps_test bash

To run the python file inside the container: check the status of the channel 0 :

hvps_ctrl.py --status  --chan 0

You will see the following statement:

Could get the IP address for the hostname :%s 10.2.2.20
Initilizing HVPS...
DEBUG_INIT::::: admin admin b'10.2.2.20' 10.2.2.20 ds-hvps 2 0
Initialized Connection to : 10.2.2.20
communicating with HVPS, check SLOT # and Channel #, IP : b'10.2.2.20', ERROR code : 0x0
Slot: 4 | Channel Name: LV_1-0 | Channel#: 0 | V0Set : 5.0 | I0Set : 1.1 | RUpTime : 100.0 | RDwTime : 100.0 | Trip : 0.1 | UNVThr : 0.0 | OVVThr : 7.0 | VMon : 0.0 | VCon : 0.4 | IMon : 0.0 | Temp : 0.0 | Pw : 0.0 | TripInt : 0.0 | TripExt : 0.0 | ChToGroup : 0.0 | OnGrDel : 0.0 | Status : Off