National Instruments, Austin
Since 1976, National Instruments (NI) has taken off-the-shelf semiconductor and computing technology and applied it to measurement, diagnostics and instrumentation needs. NI leverages the rapid technological advancement of the semiconductor and computer industry, while retaining the flexibility and ensuring interoperability between HW & SW. This technical session will focus on the various models of computation, multicore technology applied to measurement and diagnostic needs, communication protocols, timing and synchronization, and FPGA designed-in to meet custom needs. Additionally we will see examples of Graphical System Design being applied at CERN, Max Planck, LANL, ESO and how COTS HW & SW technologies can be used to solve instrumentation needs.
LANL, Los Alamos, New Mexico
This study evaluates a technique for the closed-loop position and velocity control of a wire scanner actuator. The focus of this technique is to drive a stepper motor-driven actuator through a 1-mm move using a combination of velocity feedback control and position feedback control. More specifically, the velocity feedback control will be utilized to provide a smooth motion as the controller drives the actuator through a pre-planned motion profile. Once the controller has positioned the actuator within a certain distance of the target position, the controller will transition to position-based feedback control, bringing the actuator to its target position and completing the move. Position and velocity data is presented detailing how the actuator performed relative to its commanded movement. Finally, the layout of, and algorithms employed by the wire scanner control system are presented.
LAL, Orsay
The PHIL (PhotoInjector at LAL: http://phil.lal.in2p3.fr/ ) accelerator is the new LAL (Orsay, France) facility dedicated to test state-of-the-art RF and beam sources technologies used for future electron accelerators. The machine based on 3 GHz RF gun triggered with a 262 nm wavelength laser, delivers a low energy ( E<10 MeV) single pulse electron beam at 5 Hz, with a low charge (0.1 nC) for now. The machine is about 5 meters long, with one direct and one deviated beam line (created after a 60° dipole). This paper describes the current status (first beam in november 2009) and the development of the diagnostics sections of the machine. At present, the machine is equipped by a transverse beam profile monitor based on «YAG:Ce» screen (30 mm diameter and 300 micrometers thick), two BPMs (one "button type" and one "reentrant resonators" type) and two Faraday cups (at the end of each line). The paper will present some preliminary results of the dimension and position of the beam at specific point for different charges and phase, and will present the expected development of the diagnostics of the machine (measurement of mean and energy dispersion, 2D emittance, beam length).