EXTREME LOW ENERGY RIN ING FOR ANTIPROTONS (E (ELENA) AT CERN A. - - PowerPoint PPT Presentation

IO ION SOURCE IN INTEGRATION AT THE EXTREME LOW ENERGY RIN ING FOR ANTIPROTONS (E (ELENA) AT CERN

SECOND ANNUAL MATTER AND TECHNOLOGIES MEETING

• KARLSRUHE. MARCH 2016
• A. Megía-Macías, R. Gebel, H-P. May, N. Rotert, A. Kieven, B. Lefort. C. Carli and F. Butin

Ana Megía-Macías Second Annual Matter and Technologies Meeting. Karlsruhe. March 2016 2

Antiproton Decelerator at CERN

Ana Megía-Macías Second Annual Matter and Technologies Meeting. Karlsruhe. March 2016 3

The AD physics program is focused on trapping antiprotons in Penning traps where antihydrogen is formed after recombination with positrons

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.
• Currently the experiments use degrader foils to reduce the energy but 99.9 %
• f 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 4

The AD physics program is focused on trapping antiprotons in Penning traps where antihydrogen is formed after recombination with positrons

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.

• H+ and H- ions can be circulated in the same direction by changing the polarity
• f the ring or in opposite directions keeping the same polarity.

Ana Megía-Macías Second Annual Matter and Technologies Meeting. Karlsruhe. March 2016 5

The AD physics program is focused on trapping antiprotons in Penning traps where antihydrogen is formed after recombination with positrons

ELENA Ring Setup

AD ELENA Injection line Ion source ELENA Ejection line Ion switch

Ana Megía-Macías Second Annual Matter and Technologies Meeting. Karlsruhe. March 2016 6

The AD physics program is focused on trapping antiprotons in Penning traps where antihydrogen is formed after recombination with positrons

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

• 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 7

The AD physics program is focused on trapping antiprotons in Penning traps where antihydrogen is formed after recombination with positrons

ELENA Ion Source

Ana Megía-Macías Second Annual Matter and Technologies Meeting. Karlsruhe. March 2016 8

The AD physics program is focused on trapping antiprotons in Penning traps where antihydrogen is formed after recombination with positrons

ELENA Ion Source: Stage I

The AD physics

PULSE GEN. FILAMENT PS

• +

ARC PS

• +

Source

9

PULLER PS CONTROL UNIT 220V/400Hz conv. CONTROL UNIT QUADRUPOLE PSs

PC PC

WS CONTROL

PC

MAINS

HIGH VOLTAGE AREA

HIGH VOLTAGE CABINET GROUND CABINET

PC

Pepper-pot Puller Screen Camera Quadrup.

High voltage Electronic signals Fiber optics Computer com.

Main trigger

• Calib. signal

Current meas.

CT WS

Stepper motor trigger Measurement trigger WS measurement

SCOPE

TTL to FO e- e- e- e- e-

HIGH VOLTAGE PS (+/-100kv)

Ana Megía-Macías Second Annual Matter and Technologies Meeting. Karlsruhe. March 2016

Ana Megía-Macías Second Annual Matter and Technologies Meeting. Karlsruhe. March 2016 10

The AD physics program is focused on trapping antiprotons in Penning traps where antihydrogen is formed after recombination with positrons

ELENA Ion Source Diagnostics

• Current transformer
• Wire scanners
• Pepper-pot + viewer

Pepper-pot Puller Screen Cam. Quadrupoles

e- e- e- e- e-

CT WS Plasma chamber

Ana Megía-Macías Second Annual Matter and Technologies Meeting. Karlsruhe. March 2016 11

The AD physics program is focused on trapping antiprotons in Penning traps where antihydrogen is formed after recombination with positrons

ELENA Ion Source Diagnostics: Current Transformer

Calibration pulse Beam current

Ana Megía-Macías Second Annual Matter and Technologies Meeting. Karlsruhe. March 2016 12

The AD physics program is focused on trapping antiprotons in Penning traps where antihydrogen is formed after recombination with positrons

ELENA Ion Source Diagnostics: Wire Scanner

Beam Pepper pot plate Wire scanner profile Wire scaner movement Beamlets

Ana Megía-Macías Second Annual Matter and Technologies Meeting. Karlsruhe. March 2016 13

The AD physics program is focused on trapping antiprotons in Penning traps where antihydrogen is formed after recombination with positrons

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: Wire Scanner

Ana Megía-Macías Second Annual Matter and Technologies Meeting. Karlsruhe. March 2016 16

The AD physics program is focused on trapping antiprotons in Penning traps where antihydrogen is formed after recombination with positrons

ELENA Ion Source Diagnostics: Pepper Pot

Background Beam

Ana Megía-Macías Second Annual Matter and Technologies Meeting. Karlsruhe. March 2016 17

The AD physics program is focused on trapping antiprotons in Penning traps where antihydrogen is formed after recombination with positrons

ELENA Ion Source: Stage II

Ana Megía-Macías Second Annual Matter and Technologies Meeting. Karlsruhe. March 2016 18

The AD physics program is focused on trapping antiprotons in Penning traps where antihydrogen is formed after recombination with positrons

PULSE GEN. FILAMENT PS

• +

ARC PS

• +

Source PULLER PS CONTROL UNIT 220V/400Hz conv. QUADRUPOLE PSs

PC PC

WS CONTROL

PC

HIGH VOLTAGE CABINET GROUND CABINET

PC

Pepper-pot Puller Screen Cam. Quadrup.

High voltage Electronic signals Fiber optics Computer com. HV area

Main trigger

• Calib. signal

HIGH VOLTAGE PS (+/-100kv)

Current meas.

CT WS

Stepper motor trigger Measurement trigger WS measurement

PICOSCOPE

TTL to FO

Coaxial cables

FLOW CONTROLLER PS

Flow controller CONTROL UNIT

MAINS

e- e- e- e- e-

Ana Megía-Macías Second Annual Matter and Technologies Meeting. Karlsruhe. March 2016 19

The AD physics program is focused on trapping antiprotons in Penning traps where antihydrogen is formed after recombination with positrons

ELENA Ion Source: Stage II

Ana Megía-Macías Second Annual Matter and Technologies Meeting. Karlsruhe. March 2016 20

The AD physics program is focused on trapping antiprotons in Penning traps where antihydrogen is formed after recombination with positrons

ELENA Ion Source: Stage II

Ana Megía-Macías Second Annual Matter and Technologies Meeting. Karlsruhe. March 2016 21

The AD physics program is focused on trapping antiprotons in Penning traps where antihydrogen is formed after recombination with positrons

Current Status of ELENA Project

• Supports and alignment tables installed.
• Cabling campaign finished.
• Cooling pipes installed.
• Ion source installed and operational.
• Ion switch installed.
• LNS line on installation
• First bending magnets to be installed in

the coming weeks.

THANKS FOR YOUR ATTENTION