Measurement of the Sextupole String "Center" on the AGS Injection Porch (AGS Studies Report No. 332)

Abstract

The primary motivation for this study was to remeasure the radius that the AGS orbit acquisition system reported for the center of the AGS high field sextupole arrays. The sextupole center is defined here as that radius at which the betatron tune of the machine is not affected by changes in the current in the sextupole strings. It is claimed (Ahrens private communication) that the AGS orbit system reports radial positions relative to the "Beam Code axis" which lies on average about 4mm to the outside (larger radius or larger circumference) of R₀. The Sextupoles are surveyed in on R₀. Therefore, if life were simple we would expect to learn that the sextupoles did not affect either horizontal or vertical tune if the radius were set to -4mm according to the orbit system.

Related Papers

• → Territory and mobility in the American suburb(2004)1 cited
• Men on Porch(1950)
• بررسی سیر تحول ایوان در خانه های نهبندان از قاجار تا پهلوی(2017)
• → Group of about fifteen people on the porch of the Ojai Valley Inn, ca.1880(2012)
• → Lyke porch or litch porch(1853)