HV issues - update

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User name R. Michaels

Log entry time 11:39:40 on February13,2014

Entry number 385935

keyword=HV issues - update

Overnight the HV crates on the 2 HRS was stable. I did not have to
restart servers.

Today we had a meeting about HV control -- present were J. Gomez, B. Sawatzky, R. Pomatsalyuk, R. Michaels

The action items:

1. Ask Jack to check the cards on R-HRS. After fixing L-HRS grounding issues the HV control in that crate did become more stable.

2. Order some PCI-to-serial cards. Brad just did this. This will allow us to have multiple crates on one intelPC, and it should be much faster, too. (Want to avoid USB adapters).

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A short summary of the issues:

Due to unknown reasons, possibly grounding, there is a small probability for the serial cards to return strings that are corrupted somehow. They may be empty or partially complete or nonsense. This throws the Java GUI into a tizzy and may crash it.

One workaround is to type commands at the command line on the PCs that are connected to the crates. Another workaround is a simple C code (adapted from Javier) which can a) read the HV parameters and save them to a file; and b) take HV parameters from a text file and load them to a crate. There is a first working version of this. I'll make sure the grad students are aware of this.