PPT-Preliminary results of transverse (dipolar) impedance measurements on the MKI

Vasilis Vlachodimitropoulos Acknowledgements Mike Barnes Yves Sillanoli Simulation results reminder From the presentation at the 24 th IWG meeting 21112018 24th IWG meeting 2 Dipolar X. 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. Contact interaction is short-range. . scattering length is small. Bose. gases are dilute. Optical lattices are big. Increase. scattering length: . unitarity. But this is still an s-wave interaction, for bosons. 7 . (. Cycloaddition. . Reactions. ). A . cycloaddition.  is a . pericyclic.  . chemical reaction. , in which "two or more unsaturated molecules (or parts of the same molecule) combine with the formation of a cyclic adduct in which there is a net reduction of the bond multiplicity.". 3-4-2014. Impedance overview. ac source. cell. R. C. d. c null detector. ac null detector. Potentiometer to null dc voltage. R. B. d. c null detector. R. A. V. –. +. R. u. R. I. 1. . + I. 2. . I. DRs. :. What we know so far and what else we need to study….. E. . Koukovini-Platia. . M. Barnes, A. . Grudiev. , N. . Mounet. , Y. . Papaphilippou. , G. Rumolo. Updated list of parameters . with the new lattice design at 3 TeV . E. . Koukovini-Platia. CERN, EPFL. TIARA mid-term meeting, Madrid, 13. th. June 2012. Many thanks to . M. . Dehler. , N. . Milas. , A. . Streun. CLIC . DR/ SLS . parameters. SLS Parameter. Value. Energy [. growth issues in HT. The problem: . Observed . emittance. growth in Diego’s . multiturn-multikick. HT release, both in presence of a dipolar . wakefield. and a . dipolar+quadrupolar. . wakefield. Update. Fritz Caspers and Jose E. Varela. Outline. Introduction. The ‘Thomas Bohl’. Simulations. Measurements. Next . Steps. Conclusions. Introduction. We . continue to search for possible causes of the suspected 1.4GHz . 3-4-2014. Impedance overview. ac source. cell. R. C. d. c null detector. ac null detector. Potentiometer to null dc voltage. R. B. d. c null detector. R. A. V. –. . R. u. R. I. 1. . I. 2. . I. 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 . Vasilis Vlachodimitropoulos. Acknowledgements: Mike Barnes, Lorena Vega Cid. 30/05/2017. 1. HL-LHC WP14 Coordination Meeting. Motivation (1). MKI overview given by Mike. Circulating beam passes through U-shaped yokes. MKI heating estimates. Vasilis Vlachodimitropoulos. Acknowledgements: . M.Barnes. , H. Day, L. Vega Cid. MKI’s role. Take beam from SPS and put in a stable orbit of LHC. SPS. LHC. Injected Beam. Circulating Beam. 08 Nov 2017. A.Mereghetti. 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.