elena ion source 1 commissioning and preliminary results ana megia. cern. september 2015

ANA MEGIA. CERN. SEPTEMBER 2015 1

ELENA ION SOURCE

COMMISSIONING AND PRELIMINARY RESULTS


H+/H- production

+/-100 kV Bias voltage

Tungsten filament

Decapole magnet

Magnetic filter

Pulsed extraction

Currents of tens of µA

ELENA Ion Source Design


PULSE GEN.FILAMENT PS -+

ARC PS-+

Source

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

PCPepper-pot

Puller

ScreenCam. Quadrup.

High voltage Electronic signals Fiber optics Computer com.

e-

e-

e-

e-

e-

Main triggerCalib. signal

HIGH VOLTAGE PS (+/-100kv)

Current meas.

CTWS

Stepper motor trigger

Measurement trigger

WS measurement

PICOSCOPE

TTLtoFO


Source characterization


Wire scanners

Pepper-pot

Current transformer

Raw data


Where to begin?

H+/H-

Arc voltage

Arc current

Gas flow

Source voltage

Puller voltage

Quadrupole settings


Wire Scanner analysis

Pepper-pot analysis

9

Results comparison (EIS-NP-SC-014)

WIR

E

SCA

NN

ERPE

PPER

PO

T

ANA MEGIA. CERN. SEPTEMBER 2015



WIR

E

SCA

NN

ERPE

PPER

PO

T


Results comparison (EIS-PP-SC-004)



WIR

E

SCA

NN

ERPE

PPER

PO

T


Source re-installation


What’s next?

Improve the ellipse fitting.

Analysis of all results.

Is it possible to get better RMS Emittance values??

Determine new interesting points to be measured.

Analyze Pepper-pot images for all the measurement points.

Ideas are welcome.

Waiting for some parts from Jülich (HV cables & safety hood). September 2015

Measurement plan for the source and the ion switch (Daniel Barna)

Timing and Oasis.

Integration of the source in the AD control system?

Regarding previous measurements:

Regarding source future operation:


Timing


PULSE GEN.

PICOSCOPECURRENT

TRANS.

CONTROL UNIT PULLER PS PULLER

WS MEAS.

WS STEPPER MOTOR

WS CONTROL

CONTROL TEST STAND

PICOSCOPECURRENT

TRANS.

CONTROL UNIT PULLER PS PULLER PS

WS MEAS.

WS STEPPER MOTOR

WS CONTROL

Local control of the source parameters

Trigger cable

OPTION I: LOCAL CONTROL (€)

OPTION II: REMOTE CONTROL (€€€)

5000 €1805 €

?

Trigger cable

Source parameters controlled from the control room by remote desktop app

Ethernet

Serial cable


PICOSCOPECURRENT

TRANS.

CONTROL UNIT PULLER PS PULLER

WS MEAS.

WS STEPPER MOTOR

WS CONTROL

OPTION III:LOCAL CONTROL PREPARED FOR FUTURE REMOTE CONTROL (€€)

PULSE GEN.

OPTION IV: INTEGRATION OF THE SOURCE (€€€€)

OPTION II + man power

Trigger cable

1805 €

Source parameters controlled from the control room by remote desktop app

Ethernet

Serial cable


QUESTIONS FROM TIMING TEAM

Will the source be always operated in pulsed mode? If so, which are the maximum and minimum frequency and pulse length?

Once the commissioning is finished and ELENA is connected to the AD ring, will the source need to be synchronized with the AD beam?


Oasis


PICOSCOPE OASIS

Picoscope trigger

CT calibration signal

Ion current

Wire scanner signal

Main trigger

CT calibration signal

Ion current

Extraction pulse

trigger


Comments…

Cable request deadline 25th September !


H- preliminary results


H+ preliminary results

elena ion source 1 commissioning and preliminary results ana megia. cern. september 2015

Documents

2015timing21ana megia

preliminary resultsana

raw dataana megia

results comparison eisnp

source option

results comparison eispp

control room

control unitpuller pspullerws