A.Blas AB/RF/FB APC meeting 20/4/ Status of the PS TFB Upgrade launched in July 2005 L. Arnaudon, A. Blas, F. Caspers, D. Glenat, R. Louwerse, V. Rossi 1.Background 2.System block-diagram 3.Hardware overview 4.Planning

A.Blas AB/RF/FB APC meeting 20/4/ PS TFB Background 05/05Presentation to the APC to ask for some founding (new amplifiers, Strip line kicker upgrade kicker impedance matching transformers, PLC control system, LHC type electronic core …) System specified for < +/- 2mm injection errors and compatibility with LHC: End 06System expected to be ready

A.Blas AB/RF/FB APC meeting 20/4/ PS TFB Blue boxes represent new hardware since 6/05 Block diagram

A.Blas AB/RF/FB APC meeting 20/4/ PS TFB Pick-up amplifiers (J. Belleman) Were ready in October 2003 BW: 20 kHz – 40 MHz 80 dB dynamic range (compatible with ions) Remotely programmable gain Located in the ring below concrete slab

A.Blas AB/RF/FB APC meeting 20/4/ PS TFB Electronic core Ongoing design using the hardware foreseen for the LHC 1TFB Ready in late 2007 ????.

A.Blas AB/RF/FB APC meeting 20/4/ PS TFB Electronic core

A.Blas AB/RF/FB APC meeting 20/4/ PS TFB Clock generation (J. Sladen) 1 GHz DDS Available since mid-2004 Receives the frequency program from the PS central building and outputs the 160*Frev (< 80 MHz).

A.Blas AB/RF/FB APC meeting 20/4/ PS TFB Pre-Amplifier  Fast Clipping of the output signal  0 and 180 o outputs  Programmable gain  TFM setup  Local / Remote control  Interface with the PLC control  Compatible with analogue systems

A.Blas AB/RF/FB APC meeting 20/4/ PS TFB Power Amplifier [2.5 kHz – 23 MHz], 3kW – 5ms, 750W - CW 4 amplifiers required + 2 spares 2 amplifiers ready used in 2006 MDs 3 amplifiers under final tests 1 amplifier under construction waiting for missing material

A.Blas AB/RF/FB APC meeting 20/4/ PS TFB Power Amplifier AmplitudePhase Power Response (inactive trace = version used in MD)

A.Blas AB/RF/FB APC meeting 20/4/ PS TFB Impedance matching transformers Input impedance: 50 Ω Output impedance: 100 Ω Each coax: 50 Ω Voltage gain = 2 [ 2kHz – 40 MHz] up to 3 kW

A.Blas AB/RF/FB APC meeting 20/4/ PS TFB Kicker

A.Blas AB/RF/FB APC meeting 20/4/ PS TFB Kicker

A.Blas AB/RF/FB APC meeting 20/4/ PS TFB Power loads 50 Ω / 30 dB Attenuator [ DC – 1GHz] 1 kW CW 100Ω to 50Ω resistive transition [ DC – 190 MHz] 1.6 kW CW

A.Blas AB/RF/FB APC meeting 20/4/ PS TFB Power Control

A.Blas AB/RF/FB APC meeting 20/4/ PS TFB Water cooling Electric valves coupled to leak detectors

A.Blas AB/RF/FB APC meeting 20/4/ PS TFB LHC 26 GeV + MTE MD setup

A.Blas AB/RF/FB APC meeting 20/4/ PS TFB 26 GeV MD setup 2100 ns Notch delay ns 1-turn- delay

A.Blas AB/RF/FB APC meeting 20/4/ PS TFB MTE blow-up at 14 GeV, Oct.2006, A. Franchi, S. Gilardoni, M. Giovannozzi, D. Quatraro See APC slides 9 March GeV, LHC beam transverse damping, Oct. - Nov R. Steerenberg, G. Arduini, E. Benedetto, H.Damereau, A. Grudiev, W. Höfle, E. Métral,M. Morvillo, C. Rossi, G. Rumolo……. (APC slides 22 September and 15 December 2006) - Excitation–Damping test. Observation of the first betatron line amplitude: 5.7 ms damping time instead of 21 ms natural decay (100 to 5 %),with C10 cavities only active. No significant results with C20, C40 or C80 Problem found afterwards: Power resistors (200W CW, 3kW/2ms peak) dead !! MD’s

A.Blas AB/RF/FB APC meeting 20/4/ PS TFB Summary The transverse feedback system is waiting for its VME electronic core to be completed. For this unit, the time table is under discussion The system is ready for another set of measurements on the 26 GeV flat-top. The system is ppm => parallel MDs