LHC collimation system hardware commissioning

Abstract

The stored energy and intensity of the LHC beam exceed the damage level of the machine and the quench level of the magnets by far. Therefore a robust and reliable collimation system is required which prevents the quenching of the magnets during regular operation and protects the accelerator components from damage in the event of beam loss. To assure that the installed collimators will protect the machine and permit the required performance of the collider, an appropriate hardware commissioning has to be implemented. In this contribution we describe the procedures for the hardware commissioning of the LHC collimation system. These procedures will establish the required precision and reliability of collimator movements and settings before the start of beam operation. Large Hadron Collider Project AbstractThe stored energy and intensity of the LHC beam exceed the damage level of the machine and the quench level of the magnets by far. Therefore a robust and reliable collimation system is required which prevents the quenching of the magnets during regular operation and protects the accelerator components from damage in the event of beam loss. To assure that the installed collimators will protect the machine and permit the required performance of the collider, an appropriate hardware commissioning has to be implemented. In this contribution we describe the procedures for the hardware commissioning of the LHC collimation system. These procedures will establish the required precision and reliability of collimator movements and settings before the start of beam operation.

Design, construction, and beam tests of a rotatable collimator prototype for high-intensity and high-energy hadron accelerators

“…The dynamic torque was measured by performing jaw movements from the inner to the outer switches, while the static torque was measured through 50 μm jaw step movements. The maximum torque (∼0.4 Nm) compares well to the LHC requirement of 0.5 Nm [20], and as expected there is a linear increase in the torque with jaw position due to the return springs which automatically retract the jaws to parking positions in the event of a power failure.…”

Design and implementation of a crystal collimation test stand at the Large Hadron Collider

“…on longitudinal positions, come from space availability in the present collimation insertion, at locations where optics parameters are optimised for crystal collimation. To minimize impacts on the present tunnel infrastructure, crystals are mounted on standard collimator supports and use a similar fast plugin technology [21]. Slots already equipped with collimator supports, prepared for future upgrades that will only be deployed beyond 2018, were available and therefore considered for installation.…”

Beam impact tests of a prototype target for the beam dump facility at CERN: Experimental setup and preliminary analysis of the online results

“…The outer stainless steel tank encloses the inner tank, ensuring the leak-tightness of the assembly, and also provides an interface for the electrical and water connections. The target prototype outer tank is placed on a modified Large Hadron Collider (LHC) collimator support [21], which consists of two different plates (upper and lower) with guiding pins. The design of the collimator support with plug-in features permits the precise installation and alignment of the upper plate on top of the lower plate by means of fully remote handling equipment without human intervention.…”