Periodic Reporting for period 5 - ENUBET (Enhanced NeUtrino BEams from kaon Tagging)
Período documentado: 2021-03-01 hasta 2022-11-30
In addition we have developed a magnetic layout capable of guiding the unstable particles that originate the neutrinos inside the region where the monitoring occurs. This “magnetic” path is currently about 27 m in length and consists of elements for focusing (called quadrupoles) and bending (dipoles). Among all the particles produced when protons are impinged of a graphite target only a subset of “useful” particles are selected having the right energy to produce the neutrinos we are interested in. A narrow and collimated beam of these particles is then guided and sent into the decay tunnel. Having such a sharp beam is mandatory since the instrumentation would not tolerate the particle intensities that would be created if the particle beam would not be properly “contained”. After having worked out and studied the most promising layout we are optimizing it to reduce the contributions from undesired particles disturbing the measurement of positrons (“backgrounds”). This is achieved through a careful study of absorbing materials along the system and the parameters of the magnets (geometry, currents).
Another interesting output of our studies has been the development of a new procedure for extracting protons from particle accelerators. This procedure has been tested at the CERN-SPS accelerator with protons having an energy of 400 GeV. By acting on the currents of focusing magnets in the accelerator ring according to a particular scheme it was possible to extract the protons in a sequence of short pulses of a few thousands of a s with a repetition of about 10 bursts per second.