Q-memory resident histogramming system

The LAMPF Data-Acquisition System Q includes a subsystem to allow the user to create, delete, enter data in, and retrieve data from histograms stored in memory. The system is implemented on PDP-11 computers RSX-11M V4.0 as an I/O driver with user-callable subroutines interfacing to the driver. A system with an identical user interface will soon be available on VAX computers under VMS V3.2

The LANSCE RICE control system upgrade.

The LANSCE (Los Alamos Neutron Science Center) control system upgrade program continues with the impending replacement of the RICE (Remote Instrumentation and Control Equipment) subsystem. The RICE subsystem upgrade is a challenge because of its technology (late 1960s), number of channels (>10,000), and unique characteristics (all-modules data takes, timed/flavored data takes). The plan is to replace at least the non-timed data and the command portions of the subsystem with Programmable Logic Controllers (PLCs). We discuss motivations, technological challenges, proof-of-principle, and planning. The boundary condition, as usual, is that we must implement these major changes on a running accelerator