PPT-TCSPM Beam Tests at the LHC and Ideas for IR7 Low-Impedance Upgrade for LS2

08 Nov 2017 AMereghetti 2 A Mereghetti on behalf of the LHC Collimation Team Many thanks to all teams involved in the work especially to the LHC impedance team Outlook Introduction TCSPM Measurements at the LHC. Electrical impedance extends the concept of resistance to AC circuits describing not only the relative amplitudes of the voltage and current but also the r elative phases When the circuit is driven with direct current DC there is no distinction be 63mm VM with unshielded Bellows. Tuesday 6/11 2012. O.Berrig. & B. Salvant . 1. CST model of the VM module (diameter = 63 mm). 2. 63 mm. CST model of the RF fingers. 3. The natural state of the RF fingers. Y-Chamber for . SPS Crab . cavity. By Phoevos Kardasopoulos. Thanks to Benoit Salvant. ,. Pei Zhang, Fred Galleazzi, Roberto Torres-Sanchez and Alick MacPherson . Impedance Meeting. Date: 14/04/14 . Review Committee. :. Giorgio . Apollinari. (FNAL), Wolfram Fischer (BNL), Marzio Nessi (ATLAS), . Carsten. . Omet. (GSI. ), . Rudiger. . Schmidt (CERN/ESS), . Mike Seidel . (PSI, Chair. ).. M. ain focus. Preliminary analysis. . . C. . Zannini, E. . Metral, G. Rumolo, B. . Salvant . Model studied. LHC design as it is built and installed. weld. In this step we are only interested to understand the effect of the weld .. of perfect flat surfaces with uniform resistance. Martin Duignan, Elisa Garcia-. Tabares. , Laura . Grob. , . Xiuguang. . Jin. , Anne-Laure . Lamure. , Mostafa . Salahshoor. , Roberto . Salemme. , Theo Sinkovits . Karl Bane. FLS2012 Workshop. 7 March 2012. Longitudinal microwave instability. --Coherent synchrotron radiation (CSR). --Impedance scaling for small angle transitions. --Impedance budget. of perfect flat surfaces with uniform resistance. Martin Duignan, Elisa Garcia-. Tabares. , Laura . Grob. , . Xiuguang. . Jin. , Anne-Laure . Lamure. , Mostafa . Salahshoor. , Roberto . Salemme. , Theo Sinkovits . Electron cloud and single . beam collective effects . due . to beam coupling impedance in FCC-. ee. E. Belli, M. . Migliorati. , S. . Persichelli. , M. . Zobov. Outline. Resistive wall wake fields and impedances . George W. Dodson. Accelerator Advisory Committee. February 16 – 18, 2016. Requirements for an AIP Project. DOE provides AIP funds to SNS for . additions, modifications, and improvements. to the research accelerator and ancillary equipment facilities to . Montreux, 20-22 January 2020. Upgrade . beyond baseline: LIU2. H. Bartosik. With input from:. M. Barnes, . M. . Calviani. , P. Cruikshank, H. . . Damerau. , GP. Di Giovanni, B. Goddard, . K. . Hanke. S. Antipov. 04/20/18. Problem: Larger than expected tune shift of Mo-coated TCSPM stripe. MD 2193, nominal beam. MD 2191, high-intensity beam. 4/20/2018. Effect of surface roughness on TCSPM tune shift. Impedance tutorials:. Sergio Calatroni, Benoit Salvant. Many thanks for their help and support to. David Amorim, Nicolo Biancacci and Francesco Giordano . (CERN, ImpedanceWake2D). Monika Balk, Nadine . Mario Beck - HSC section meeting - 2 October 2017. Thanks to: The . Impedance Working Group, Bruno Balhan, Mike Barnes, Giovanni . Rumolo. , . Carlo Zannini. Introduction I. Beam coupling impedance describes the interaction of the beam with its surrounding in frequency domain (wake in time domain).