Minutes/Action items of "Instrumentation-Systems-SDA" monthly meeting December 5, 2007 ------------------------------------------------------------------------- J. Annala, T. Bolshakov, M. Convery, N. Eddy, K. Gollwitzer, I. Kourbanis, V. Lebedev, T. Meyer, V. Papadimitriou, J. Patrick, B. Pellico, S. Pruss, , D. Slimmer, R. Thurman-Keup, A. Valishev, S. Werkema, J. Zagel We discussed the following: -------------------------- 1) Recycler damper status Nathan Eddy 2) Status of the MI longitudinal emittance algorithm commissioning Randy Thurman-Keup 3) Sync Lite status Randy Thurman-Keup/Timofei Bolshakov 4) Flying Wire status and MI 8 GeV transverse emittance during transfers Jim Zagel/Vaia Papadimitriou 5) IPM status Jim Zagel 6) Tevatron lattice and Tevatron emittances Alex Valishev/Mary Convery ------------------------------------------------------------------------------------ Conclusions-Action Items: 1) We are still commissioning the new vme recycler damper system. This has been a complicated process due to tracking down glitches in the new hardware/firmware. The current plan is to test a fix a glitch uncovered while installing the new system. This will be done over the next few weeks. Once the new hardware is demonstrated operational, then we proceed with studies aimed at improving the stability of the Recycler to achieve higher beam densities. In the meantime, we are operating on the old proto-type damper. 2) The code containing the new emittance algorithm for the Main injector is assembled and being tested during stacking cycles. So far the results look encouraging. The expectation is that within about a week $2B's will be requested for further checking. At this point data will be captured and sent to Alvin for further evaluation. 3) There were some recent stores for which the remove halo case for protons and pbars had 0 values in the summary SDA tables for Sync Lite although the corresponding SDA_Viewer values were reasonable. This was traced down to be due to the fact that the information was taken from the dataloggers after one minute from the declaration of Remove Halo in SDA and the info was not available at the time due to some recent changes. Two actions were taken to repair this. The Sync lite emittance code was modified to look at the SDA database if the datalogger information is not available, and the the datalogger information is now being checked at 2 minutes after the declaration of Remove Halo. Both features are working and the corresponsing emittances were backwards computed till the beginning of FY08. 4) 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 soem 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. 5) More work is needed to make the Main Injector IPM data more easily usable by the Systems people and more easily comparable with FW measurements. The IPM devices have to go into ACNET and later in SDA. Before that is possible, a piece of code has to be written. The expectation is that this chain will be complete by the end of January. 6) There is more work being done in order to understand better the transverse emittances during the pbar transfers. Some IPM data has been taken for the beam en route from Accumulator through the Main Injector for the Recycler. We will try to see if any lattice mismatches could be identified. 7) There is a new Tevatron lattice available both at Injection and at Collisions and we plan to implement it in SDA soon. This lattice is to be effective after the end of the shutdown. When this is implemented we will have to check the emittance history again, both for the recomputed emittances as well as for the OAC emittances. Our next meeting is scheduled for February 6, 2007.