Status of the H1 Very Forward Proton Spectrometer

TL;DR

The paper reports on the status and performance of the H1 Very Forward Proton Spectrometer, which has been collecting data since 2005 to measure diffractively scattered protons at HERA.

Contribution

It provides an overview of the experimental setup and the tagging performance of the VFPS during 2006 and 2007 data collection periods.

Findings

High acceptance in the $ pom$ range [0.01, 0.025] for diffractive protons

Successful data collection and performance evaluation since 2005

Detailed description of the detector setup and operation

Abstract

The Very Forward Proton Spectrometer (VFPS) of the H1 experiment at HERA is collecting data since 2005. The fiber detectors in the Roman pots located at 218 and 222m downstream from the H1 interaction point, tag and measure diffractively scattered protons with a high acceptance in the $\xpom$ range [0.01, 0.025]. The experimental set up and the spectrometer tagging performance using diffractive events collected during 2006 and 2007 are discussed.