The DIGITHEL2 experiment is dedicated to the design of high-speed ultra low-power digital gates with superconducting technologies and is conducted by INFN Roma Tor Vergata and the University of Roma Tor Vergata Physics Detartment in close collaboration with Hypres inc.
Two different kinds of technologies are studied: the Energy-efficient Rapid Single Flux Quantum (ERSFQ) and the negative-inductance SQUID (nSQUID). A series of toggle Flip Flops in ERSFQ technology, a NOT gate and a shift register in nSQUID technology were designed and successfully tested.
The final goal of the DIGITHEL2 experiment is the design of a 4 bit Arithmetic Logic Unit in nSQUID technology.
The ODRI2D experiment, carried by a join INFN and Desy collaboration, studies non-intercepting diagnostic using Optical Diffraction Radiation Interference (ODRI) for high brightness electron beams.
Conventional intercepting transverse diagnostics cannot tolerate high power beams without remarkable mechanical damages on the diagnostics device.
In Optical Diffraction Radiation (ODR) beam particles go through an hole in a metallic screen whose dimensions are smaller than the radial extension of the particle electromagnetic field. Many information on the transverse beam distribution can be extracted by the angular distribution of the emitted radiation.
In Optical Diffraction Radiation Interferenze (ODRI) a second metallic screen is put after the first ODR screen. The forward diffraction radiation, emitted when the charges pass through the first aperture, interferes with the backward diffraction radiation, produced by the interaction of the EM field with the second screen. Much more detailed information on the transverse beam distribution can be extracted in this way.
The ODRI2D collaboration realized a prototype with two orthogonal ODRI diagnostics (ODRI2D) which allowed to perform the first non intercepting emittance measurements ever realized.
The SL_COMB experiment aims at realizing an accelerated beam by the interaction of charged particles with a ionized plasma.
A so-called driver beam excites a plasma wave giving its energy to the plasma. After the driver beam a so-called witness beam is injected in the excited plasma with the appropriate phase and is accelerated by the plasma waves.
This accelerator technique has been already successfully proven in the past. The accelerating gradient of a plasma accelerator machine is at least two order of magnitude bigger than in conventional machines. The possibility to achieve such big accelerating gradients will allow to significantly reduce accellerator machine dimensions with obvious advantages in many applications from high energy physics, to material science and medical applications.
The main goal of the SL_COMB collaboration is to provide plasma based acceleration with a beam quality comparable to conventional acceleration techniques. In particular, the Tor Vergata group is involved in the design of the machine diagnostic system.