LArIAT » LArIAT Online

!https:/redmine/attachments/download/17373/Lariat_Logo_256.jpg!  

MCenter Control Room (MC-CR) x3726 or x8871

* Call the Main Control Room (x3721) at the start and at the end of shift. This is required, and pleasant.

* If the beam goes away for more than a few spills, look for Accelerator Alarms in ACNET (a default window). If the problem persists a few minutes, and you see nothing about it in the MCR elog, (or you just really want to find out more), call the MCR.  They're friendly, though they may be super-busy.

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h1. Shifter Stuff

* [[LArIAT Run 1 Shifter Instructions]] (June 2015)

** [[Run Plan]]

** "LArIAT Expert Call List":http://lariat.fnal.gov/internal/internal.html  (User is "lariat", password same as docdb)

h2. Link summary ( [[quick start]] )

* "LArIAT e-Log":http://dbweb4.fnal.gov:8080/ECL/lariat/E/index  For making/ending access, starting/ending shifts.

* [[LArIAT Run 1 DAQ Instructions]] (March 2015)

* "LArIAT Run Status Webpage":http://nusoft.fnal.gov/lariat/run.html

* "LArIAT Online DQM":http://lariat-daq01.fnal.gov:5000  (works with VPN or VNC or on-site only, for now)

* How to use the [[event viewers]]

* How to make [[DQM plots]] (may be outdated)

* "Synoptic":https://cdcvs.fnal.gov/redmine/projects/lariat-online/wiki/Using_Synoptic_for_monitoring

* "Beam monitoring(ACNET directly)":https://redmine.fnal.gov/redmine/projects/lariat-online/wiki/Using_ACNET_for_monitoring?parent=Wiki

* "Accelerator Operations Elog":https://www-bd.fnal.gov/Elog/?logNames=Operations

* "MC7 WebCam":http://131.225.176.26/

h3. Important knowledge

* "List of MC7 ACNET devices":https://redmine.fnal.gov/redmine/projects/lariat-online/wiki/MC7_in_ACNET

* [[MC-7 Enclosure Layout]]

* "In case the beam TVs are off":http://www-bd.fnal.gov/notifyservlet/www?project=&refresh=on&infolinks=top

* [[The LArIAT supercycle]] _How DAQ operations relate to the main injector supercycle_ 

* "Hardware-Connections-and-Configurations":https://redmine.fnal.gov/redmine/projects/lariat-online/wiki/Wiki#Hardware-Connections-and-Configurations

* "Electronic Hardware Documentation":https://redmine.fnal.gov/redmine/projects/lariat-online/wiki/Wiki#Electronic-Hardware-Documentation

h3. Obsolete links

* -LArIAT Engineering Run (Aug 2014) [[How to Run the Lariat Data Acquisition]]- (OBSOLETE)

* -"Shifter Instructions":https://docs.google.com/document/d/1mlN_UIOCqwhe0cFiU7mRc3-lxDZhY-4TmIy23rOzILI/pub August 2014- (Some obsolete information)

* -How to make [[Lariat DAQ Plots]]- (OBSOLETE)

h1. Troubleshooting 

Any time day or night, please call experts if you are in need of help and the answer is not provided below.

h2. *Trouble getting started*

* If you cannot ssh to FTBFLX machines: Get a kerberos ticket for yourself: @kinit <yourKerberosPrincipal>@, then ssh ftbf_user@ftbflx01 (or whichever machine...).

* If your Kerberos username and password are good, but you can't log on to FTBFLX[NN] machines:  Have someone who CAN log into those machines heck that your kerberos principal appears in @~ftbf_user/.k5login@ in the LArIAT section.

h2. *Trigger and DAQ system*

When the DAQ crashes, please post the relevant information to [[DAQerrors]] for experts to study.

h3. Common failures:

* DAQ fails with @ERROR: ReadRegisgter ACQUISITION_STATUS CAEN_DGTZ_CommError BoardId 0@  wait 2 minutes, then try to start again.

** Try issuing the command @lariatReset 0 1@ waiting more then 5 seconds, and trying again.

This command is appropriate when one sees any type of "CAEN_DGTZ" error.  This command will NOT help the persistent ports error.

* DAQ fails with @Found persistent communication port still open@

** Wait 8 minutes for the ports to clear, then try again.

h3. Other failures: 

* If the DAQ is having trouble talking to the crates, try issuing the command @lariatReset 0 1@ waiting more then 5 seconds, and trying again.

This command is appropriate when one sees any type of "CAEN_DGTZ" error.  This command will NOT help the persistent ports error.

* If the trigger crate has been power cycled and the V1495 is not emitting triggers: [[Reset1495]]

h2. *Wire Chambers*

* If the wire chambers are acting strangely: "remote power cycling instructions":https://redmine.fnal.gov/redmine/projects/lariat-online/wiki/Communicating_with_the_wire_chambers including mini-DAQ and telnet interface.

* If the wire chamber system is skipping spill numbers, it may be a high trigger rate (> 30 k per spill).  The wire chamber controller may still be reading out the hits from the last spill.

h2. Power Cycle the ASICs (TPC Wire Noise)

* Anecdotal evidence has shown that analog noise on the TPC wire readout channels can be 

alleviated by power cycling the TPC electronics: ASICs and Warm Receiver/Drivers

* You can remotely power cycle the TPC electronics via the web site http://lariat-pdu02.fnal.gov 

logging in as user "ftbf".  Choose the *CYCLE* option, which will automatically give a 60 

second powerless interlude.

* Further important informations can be found on the white board in MC-CR.

* This mechanism is controlled by a smart power distribution unit (PDU) located under the 

TPC electronics power supply near the cryostat in the enclosure.   Due to electrical safety 

rules you must *NOT* use any of the other outlets on this PDU.  Do *NOT* remove the protective 

outlet covers at any time.

!https://redmine.fnal.gov/redmine/attachments/download/25467/lariat-pdu02-cycle.png!

h2. Recover from a LAr level interlock

Assuming the LAr Level dropped low enough to trip off the TPC Cathode power supply, and maybe you even powered down the PMTs.

# Be sure HV is set to zero for these: Cathode Drift, Wire Bias, cryo-PMTs

How to control the [[Drift HV]]

# Power down the ASICs. (They should be off when TPC voltages change.)

# Bring up the Cathode

# Bring up the Wire Bias

# Bring up the ASICs

# Bring up the PMTs

h1. Hardware Connections and Configurations

* [[TPC Channel Mapping]]

* [[Non-TPC Detectors]] *Naming and numbering in MC7*

* "Cable Patch Panel Spreadsheet":http://goo.gl/JXiH8Y

* [[Connections on the Control Room Patch Panel]]

* [[Logical inputs to the CAEN V1740]]

* [[Connections into the WUT TDC]]

* [[Connections into the V1751 Digitizer]]

* [[Trigger inputs|Connections in/out of the V1495 Trigger]]

* [[Logic pulse widths and discriminator thresholds]]

* [[WUT configuration]]

* [[Timing of ACnet TCLK Events]]

* The [[Teensy]] LAr ASIC controller's configuration

* [[Punch Through counters voltages and rates ]]

h1. Electronic Hardware Documentation

* Link to LArIAT eLog http://dbweb0.fnal.gov/ECL/lariat

* [[LariatOnlineGit]] Accessing the LArIAT Online GIT repository

* [[Building LArIATOnline with CMake]]

* [[LArIAT TPC Readout Parameters]]

* [[LArASIC Preamp Documentation from BNL]]

* [[LArIAT DAQ Commercial Products]] Technical Documentation and Firmware Files

* [[LArIAT CAEN Products]] Technical Documentation and Firmware Files

* Test Beam Wire Chamber Sten Hensen's [[TDC Readout Documentation]]

* WUT Wave Union TDC: [[Jinyuan's TDC Documentation]]

* [[v1495 notes]] Notes and working area for the V1495 and V2718

* [[DAQ Configuration]] settings, parameters, starting a run

* [[Raw Data Format and Readout Source code]]

* [[All things lariat-artdaq]] (UPDATED 11/5/14)

* [[Interpreting Wire Chamber TDC Data]]

* [[LArIAT Test Stand]] Photographs

h1. Diagnostic and Control Software

_Test programs in the_ lariat-online/daq/src _directory_

* [[DumpDigitizerData]]

* [[SummarizeDAQOutput]]

* [[Reset1495]]

* [[ScalarReadout]]

* [[Data_quality_monitoring_module]]

* CAEN's [[WaveDump]] utility

h1. Examining the WC mini DAQ ASCII data

The Processor makes TTrees from the ASCII files saved by @mc7-daq.py@

[[WC MiniDAQ Data Processor]]

h1. Data Files from the year 2013

Data files for various beam conditions can be found in the [[DataFiles]] page.

h1. Meetings

* [[Connecting to LArIAT ReadyTalk]]