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Prototype of an Integrating Current Transformer for Beam Intensity Measurements in the Large Hadron Collider

Krupa M, Napieralski A

International Journal of Microelectronics and Computer Science

2013

Vol. 4, nr 1

32--36

The beam intensity (number of particles forming the beam) in the Large Hadron Collider (LHC) is measured by eight current transformers. The average beam current is monitored by the four DC Current Transformers (DCCTs) and the range from a few hundred hertz to over a gigahertz is covered by the four Fast Beam Current Transformers (FBCTs). During the early run of the LHC the beam intensity measured by the FBCTs was observed to be correlated to the beam position and charge distribution. To address the consequential limitations a prototype of an Integrating Current Transformer (ICT) has been developed at CERN as a possible future replacement of the FBCTs. In this article, its design, principle of operation along with results of first beam tests are presented. The measured beam-position-dependency of the ICT has been improved, compared to the FBCT, by a factor of 35 and 50 in the vertical and horizontal planes, respectively.

The proton beam energy measurement by a time-of-flight method

Kisieliński M., Wojtkowska J.

Nukleonika

2007

Vol. 52, nr 1

3-5

A simple TOF equipment for cyclotron protons beam energy measurement was constructed. For short distance of 165 cm between capacitive pick-up probes, the accuracy of proton beam energy is below 1% for mean beam currents above 200 nA and within the energy range 20 30 MeV.