1. INTRODUCTION  RECYCLER BPM – Original system not adequate to measure beam position precisely. It is being upgraded to meet the required physics precision. Expected to be ready by end of FY03.  MAIN INJECTOR BPM – Original system 20+ years old. Not able to see beams with different time structures. Physics requirements have been defined for the upgraded system. Technology review to take place. Expected by the end of 03.  FLYING WIRE IN RR – Not part of the original system. Built to detect emittance growth during beam transfer and to measure emittance of the stacked beam. System is being commissioned.  DAMPERS IN MI and RR – Please see the definition on DAMPER page. System to be being commissioned in FY03.  2.5MHz ACCELERATION – Produce pbar bunches of e L < 2eVs & intensity ~6E10/bunch for Tevatron ppbar operation. Study in progress.

2. RECYCLER BPM Split tube BPM Design End View Top View COURTSEY – JIM CRISP

3.  400mA  30mA

4. MEASUREMENT PRECISION OVER THE FULL DYNAMIC RANGE FOR RR Absolute - True position relative to the center of the BPM. (Covers long term stability, intensity dependence & spectral dependence.)  1.00 mm  5% of the actual position. Relative - Difference between two measurements on subsequent turns with stable beam. (Covers short term stability and resolution).  0.40 mm This is 3  or ~99.73% of the measurement should be within these limits.

5. BEAM POSITION MEASUREMENT PRECISION WITH DDC CARD IN RR HP426 RMS=19  m VP427 RMS=9  m HP428 RMS=18  m VP429 RMS=13  m

6. MAIN INJECTOR BPMs MI Ring BPM Large Aperture BPM Aperture 4.625”/1.9” Aperture 4.625”

7. 1 Protons or anti-protons to/from the RR, and anti-protons from the Accumulator (2.5 MHz) 0.5E10/bunch (2.0E10 total) to 7.5E10/bunch (30E10 total).  t)= 25ns to 50ns. 2 Protons from the Booster (53MHz) (19ns spacing) From 1 to 84 bunches. Min. Intensity = 0.5E10/bunch. Max. Intensity = 12E10/bunch 3 Protons to the Tevatron (5-9 bunches, typically 7) (53 MHz) (19 ns spacing) Up to 30 Booster bunch for tune up. Each bunch intensity between 1-12E10. For Collider running – up to 4.5E10/bunch or 30E10 after coalescing. (27E10 – TeV Run IIB doc.) 4 Anti-Protons to(from) the Tevatron. (53 MHz bunch in 2.5 MHz spacing). 36 single bunches, 4 bunches each in 9 separate batch (4X9), each bunch with intensity of  11E10(5E10). (9.4E10 – TeV Run IIB doc.) 5 For the Fixed Target Running. (including NuMI/MINOS) (53MHz) 0.5E10 to 12E10 per bunch for 50-504 bunches. MI DYNAMIC RANGE

8. MEASUREMENT PRECISION OVER THE FULL DYNAMIC RANGE IN MI This is a 3  requirement, or 99.73% of the measurements should be within these limits. Position Accuracy – 0.40mm  5% of the actual position. Difference between two measurements on pulses with stable beam. It covers long term stability and resolution. Calibration precision of – 0.20mm ± 1.25% of the the actual position

9. DDC TEST RESULTS w/53MHz BEAM Courtesy: WARREN SCHAPPERT Sample Number – 17ns Sampling Raw ADC  Sampling of 84 consecutive 53MHz(19ns) waveform at every 17ns (60MHz clock). Under Sampled. But due to long train of pulses (84 bunches) one can get away with under sampling.  Beam moving around.  Measured resolution is 0.18% of the aperture.  Intrinsic resolution of the BPM will be better than the number presented here.

10. FLYING WIRE FORK ASSEMBLY FOR THE RECYCLER SYSTEM Resolver Motor High Vacuum Feedthrough 30  m Carbon Fiber Wire FORK SYSTEM IS BEING COMMISSIONED

11. HORIZONTAL FLYING WIRE IN THE RECYCLER RING RECYCLER BEAM PIPE FLYING WIRE CAN ION PUMP TITANIUM SUBLIMATION PUMP

12. Motivation : Produce pbar bunches of  l <2eVs & intensity ~6E10/bunch for Tevatron ppbar operation Status: Studies have been conducted using four short batches of protons from the Booster Produced 2.5 MHz bunches at 8 GeV Open-loop acceleration to transition energy using 2.5 MHz RF system Carried out bunch rotation at 27 GeV and four bunches are accelerated to 150 GeV Work in Progress: LLRF for 2.5MHz bunch PHIS and RPOS controls 2.5MHz and 53MHz RF Beam- loading compensation system during acceleration Pbar Beam Injection (From RR/AR) Transition Energy (20.49 GeV) Bunch Rotation at 27 GeV and bunch transfer frm 25MHz bkt to53MHz bkt Pbar 150 GeV 2.5 MHz Acceleration 53MHz Acceleration MI Ramp used for the 2.5MHz Acceleration and stages of Beam 0peration 2.5 MHz PBAR ACCELERATION IN MI

13. Injection Beam close to Transition Beam in 2.5MHz bkts Mountain Range of 2.5 MHz Acceleration up to Transition Energy Beam Acceleration with 2.5 MHz RF system on a Slow RampBeam Acceleration from 27 to 150 GeV on a Fast Ramp Wall Current Monitor data with SBD } } BEAM DATA FOR 2.5MHz AND 53MHz ACCELERATION SHOWN SEPARATELY

14. DAMPERS IN THE MI & RR  All MI dampers are controlled by a single digital filter card with a large FPGA (EchoTek)  Longitudinal Remove coupled-bunch oscillations in beam from Booster Prevent growth of coupled-bunch instabilities in the MI Allow bunch rotation to be effective on stacking cycles Increase coalescing efficiency and reduce momentum spread in TeV  Transverse Reduce emittance growth from injection steering errors Reduce any residual emittance growth during the ramp Permit MI operation at increased intensity for NuMI

15. 53 MHz, TCLK, MDAT,... Monster FPGA(s) Minimal Analog Filter FAST ADC Stripline Pickup Minimal Analog Filter FAST ADC 14 VME 106 / 212 MHz Stripline Kicker Power Amp Minimal Analog Filter FAST ADC Resistive Wall Monitor Broadband Cavity FAST DACs > 27 MHz FAST DACs Power Amp Transverse Dampers Identical X & Y Longi- tudinal (Z) Damper 2-10 ALL-COORDINATE DAMPER WITH ECHOTEK CARD

16. MI TRANSVERSE BUNCH BY BUNCH DAMPERS -RESULTS Damping kick shared for Bunches #41 - #51 Pickup Signal from Bunch #43 Ashmanskas, Foster, Wildman, Schappert, Crisp, Nicklaus CAN ALSO ANTI-DAMP TO BLOW SELECTED BUNCH OUT OF THE MACHINE TURN NUMBER AFTER INJECTION

17. Arbitrary Betatron Phase of Kicker can be accommodated THREE TURN FILTER FOR TRANSVERSE DAMPER Damper kick is calculated from a single BPM position reading on three successive turns.