IO ION SOURCE IN INTEGRATION AT THE EXTREME LOW ENERGY RIN ING FOR ANTIPROTONS (E (ELENA) AT CERN A. Megía-Macías, R. Gebel, H-P. May, N. Rotert, A. Kieven, B. Lefort. C. Carli and F. Butin SECOND ANNUAL MATTER AND TECHNOLOGIES MEETING KARLSRUHE. MARCH 2016
Antiproton Decelerator at CERN Ana Megía-Macías Second Annual Matter and Technologies Meeting. Karlsruhe. March 2016 2
ELENA Project • The AD physics program is focused on trapping antiprotons in Penning traps where antihydrogen is formed after recombination with positrons. • Ejection energy of the AD -> 5.3 MeV • Energy suitable for trapping -> around 5 KeV. The AD physics program is focused on trapping antiprotons in Penning traps where antihydrogen is formed after recombination with positrons • Currently the experiments use degrader foils to reduce the energy but 99.9 % of antiprotons are lost. • Under this frame ELENA was designed to further decelerate the antiprotons from 5.3 MeV to 100 KeV. Ana Megía-Macías Second Annual Matter and Technologies Meeting. Karlsruhe. March 2016 3
Why do we need an H + /H - Ion Source ? • The Ion Source is used to commission ELENA while the experiments can still be connected to the AD and working. • It can provide higher intensity and more frequent injections than possible with the AD. The AD cycle is 100s. The AD physics program is focused on trapping antiprotons in Penning traps where antihydrogen is formed after recombination • H + and H - ions can be circulated in the same direction by changing the polarity with positrons of the ring or in opposite directions keeping the same polarity. Ana Megía-Macías Second Annual Matter and Technologies Meeting. Karlsruhe. March 2016 4
AD ELENA Ring Setup ELENA Injection line Ion source ELENA Ejection line The AD physics program is focused on trapping antiprotons in Penning traps where antihydrogen is formed after recombination with positrons Ion switch Ana Megía-Macías Second Annual Matter and Technologies Meeting. Karlsruhe. March 2016 5
ELENA Ion Source • The Ion Source was developed and tested at Jülich Forschungszentrum. • In the first stage it was installed at CERN with the same operating configuration that it had in Jülich. April 2015 The AD physics program is focused on trapping antiprotons in Penning traps where antihydrogen is formed after recombination with positrons • In the second stage the source has been recently installed on its final position. Ana Megía-Macías Second Annual Matter and Technologies Meeting. Karlsruhe. March 2016 6
ELENA Ion Source The AD physics program is focused on trapping antiprotons in Penning traps where antihydrogen is formed after recombination with positrons Ana Megía-Macías Second Annual Matter and Technologies Meeting. Karlsruhe. March 2016 7
ELENA Ion Source: Stage I The AD physics program is focused on trapping antiprotons in Penning traps where antihydrogen is formed after recombination with positrons Ana Megía-Macías Second Annual Matter and Technologies Meeting. Karlsruhe. March 2016 8
High voltage HIGH VOLTAGE AREA Electronic signals Fiber optics Computer com. GROUND CABINET HIGH VOLTAGE CABINET PC Pepper-pot CONTROL UNIT CONTROL UNIT WS Puller Source PC CT - FILAMENT PS PULSE GEN. + e - e - e - TTL e - e - to ARC PS QUADRUPOLE PSs FO - Camera + The AD physics Quadrup. PULLER PS 220V/400Hz conv. Screen MAINS HIGH VOLTAGE PS PC (+/-100kv) Current meas. Calib. signal WS measurement Main trigger WS CONTROL SCOPE PC Measurement trigger Stepper motor trigger 9 Ana Megía-Macías Second Annual Matter and Technologies Meeting. Karlsruhe. March 2016
ELENA Ion Source Diagnostics Pepper-pot Current transformer WS Plasma chamber Puller CT Wire scanners The AD physics program is focused on trapping antiprotons in Penning traps where antihydrogen is formed after recombination e - e - e - with positrons e - e - Quadrupoles Cam. Pepper-pot + viewer Screen Ana Megía-Macías Second Annual Matter and Technologies Meeting. Karlsruhe. March 2016 10
ELENA Ion Source Diagnostics: Current Transformer Calibration pulse Beam current The AD physics program is focused on trapping antiprotons in Penning traps where antihydrogen is formed after recombination with positrons Ana Megía-Macías Second Annual Matter and Technologies Meeting. Karlsruhe. March 2016 11
ELENA Ion Source Diagnostics: Wire Scanner Wire scanner profile Beamlets Beam The AD physics program is focused on trapping antiprotons in Penning traps where antihydrogen is formed after recombination with positrons Wire scaner Pepper pot plate movement Ana Megía-Macías Second Annual Matter and Technologies Meeting. Karlsruhe. March 2016 12
ELENA Ion Source Diagnostics: Wire Scanner The AD physics program is focused on trapping antiprotons in Penning traps where antihydrogen is formed after recombination with positrons Ana Megía-Macías Second Annual Matter and Technologies Meeting. Karlsruhe. March 2016 13
ELENA Ion Source Diagnostics: Wire Scanner The AD physics program is focused on trapping antiprotons in Penning traps where antihydrogen is formed after recombination with positrons Ana Megía-Macías Second Annual Matter and Technologies Meeting. Karlsruhe. March 2016 14
ELENA Ion Source Diagnostics: Wire Scanner The AD physics program is focused on trapping antiprotons in Penning traps where antihydrogen is formed after recombination with positrons Ana Megía-Macías Second Annual Matter and Technologies Meeting. Karlsruhe. March 2016 15
ELENA Ion Source Diagnostics: Pepper Pot Background The AD physics program is focused on trapping antiprotons in Penning traps where antihydrogen is formed after recombination with positrons Beam Ana Megía-Macías Second Annual Matter and Technologies Meeting. Karlsruhe. March 2016 16
ELENA Ion Source: Stage II The AD physics program is focused on trapping antiprotons in Penning traps where antihydrogen is formed after recombination with positrons Ana Megía-Macías Second Annual Matter and Technologies Meeting. Karlsruhe. March 2016 17
High voltage Electronic signals Fiber optics HIGH VOLTAGE CABINET Computer com. GROUND CABINET HV area FLOW CONTROLLER PC PS Pepper-pot Flow CONTROL UNIT CONTROL UNIT WS controller Source PC CT Puller - FILAMENT PS PULSE GEN. + e - e - e - TTL e - e - to ARC PS QUADRUPOLE PSs FO - + The AD physics program is focused on trapping antiprotons in Penning traps where antihydrogen is formed after recombination Coaxial Quadrup. cables Cam. with positrons PULLER PS 220V/400Hz conv. Screen MAINS HIGH VOLTAGE PS (+/-100kv) PC Current meas. Calib. signal WS measurement Main trigger WS CONTROL PICOSCOPE PC Measurement trigger Stepper motor trigger Ana Megía-Macías Second Annual Matter and Technologies Meeting. Karlsruhe. March 2016 18
ELENA Ion Source: Stage II The AD physics program is focused on trapping antiprotons in Penning traps where antihydrogen is formed after recombination with positrons Ana Megía-Macías Second Annual Matter and Technologies Meeting. Karlsruhe. March 2016 19
ELENA Ion Source: Stage II The AD physics program is focused on trapping antiprotons in Penning traps where antihydrogen is formed after recombination with positrons Ana Megía-Macías Second Annual Matter and Technologies Meeting. Karlsruhe. March 2016 20
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