CMS Pixel Telescope Addition to T-980 Bent Crystal Collimation Experiment at the Tevatron

TL;DR

This paper reports on the installation and testing of a CMS pixel telescope inside the Tevatron beam pipe to measure beam profiles in a bent crystal collimation experiment, including noise mitigation techniques and preliminary results.

Contribution

It introduces a novel in-beam pixel telescope setup with improved shielding for beam profile measurements in high-energy collider experiments.

Findings

Successful installation of the pixel telescope inside the beam pipe

Effective noise reduction through new shielding approach

Initial beam profile measurements demonstrating system functionality

Abstract

An enhancement to the T-980 bent crystal collimation experiment at the Tevatron has been completed. The enhancement was the installation of a pixel telescope inside the vacuum-sealed beam pipe of the Tevatron. The telescope is comprised of six CMS PSI46 pixel plaquettes, arranged as three stations of horizontal and vertical planes, with the CAPTAN system for data acquisition and control. The purpose of the pixel telescope is to measure beam profiles produced by bent crystals under various conditions. The telescope electronics inside the beam pipe initially were not adequately shielded from the image current of the passing beams. A new shielding approach was devised and installed, which resolved the problem. The noise issues encountered and the mitigating techniques are presented herein, as well as some preliminary results from the telescope.