Minutes/Action items of "Instrumentation-Systems-SDA" monthly meeting February 6, 2008 ------------------------------------------------------------------------- J. Annala, T. Bolshakov, K. Cahill, D. Capista, M. Convery, N. Eddy, C. Gattuso, I. Kourbanis, V. Lebedev, C. McClure, T. Meyer, R. Neswold, V. Papadimitriou, J. Patrick, L. Prost, S. Pruss, D. Slimmer, D. Still, R. Thurman-Keup, D. Voy, J. Zagel We discussed the following: -------------------------- 1) I:BEAM a) Front End : Tom Meyer/Rich Neswald b) Controls: Kevin Cahill 2) Recycler damper status Nathan Eddy 3) MI 8 GeV longitudinal emittance algorithm status Randy Thurman-Keup 4) Flying Wire and IPM status Jim Zagel 5) Upgraded RFT status Craig McClure ------------------------------------------------------------------------------------ Conclusions-Action Items: 1) Traffic coming into the MIBEAM Front-End has been very busy recently with lots of timeouts. Switching network connection from 10Mb 1/2 Duplex to 100Mb Full Duplex is high priority (need to understand first the current bad interaction between the kernel and the front-end). Kevin and Tom will keep following with the networking people on unerstanding the high traffic issues better. For the time being the front-end is being rebooted regularly in order to kill processes that may have been left running without reason. 2) Several issues (hardware and firmware related) have been addressed and fixed in the new vme recycler damper system. The system is ready for another beam test which will hopefully take place within a week. 3) The code containing the new emittance algorithm for the Main injector is complete and stable. Presently proton injections use averaging of 8 acquisitions over the synchrotron period. (The non-uniform distribution needs a bit more studying). Alvin is evaluating the data further. The next step is for Randy to test the code with pbar transfers and compare the longitudinal emittances for Main Injector and Recycler. He will also put into ACNET the new devices he created for emittance, dp/p and bucket area. After about a week of testing we will introduce these devices into SDA as well. Randy has suggested as well that all MI SBD devices are being collected when the state device V:ISBDRD indicates the data is ready instead of using clock events and delays. He will proceed to implement this. 4) As per Stan's suggestion, the attenuation has been increased in the MI pbar horizontal loss monitor. This seems to have eliminated the "double peak" feature seen earlier. There will be some additional testing on this before we definitely conclude that we understand the issue. New code is ready for testing for the Main Injector IPM. When this testing is complete and the devices are in ACNET,there will be some additional work done to generate a console page for the TeV IPM. 5) Craig anticipates that the layout technician will receive the design files for the upgraded RFT by the end of this week. The board layout should be complete by the end of February. An additional month may be required for a circuit board house to deliver a bare circuit board. 6) Status of "reverse injection and MI Flying wires" was brought up and we realized that this issue had been forgotten recently. In order to refresh our memory, here is what I had on this topic in the December minutes. " Some work has been recently done in order to perform regularly the measurement of beam sent back from the Tevatron during reverse injection cycles with the MI flying wires. Jim was not able to find the corresponding FW data during the reverse proton cycle although the understanding was they should have been saved. Perhaps some timing issue. Jim will try to identify the reason for this. After we see the data Tom will let us know what is the "offset" of the corresponding devices and the emittances will be introduced in SDA in the "eject protons" case. " Jim will follow up and let us know where we stanf and what more we have to do. Our next meeting will be in March 2008.