HEWG Meeting, Key Largo, May 14-17, 2013

SERENA / ELENA Status

1

S. Orsini (1), S. Selci (2), A.M. Di Lellis (3), A. Mura (1), E. De Angelis (1), A. Milillo (1), R. Leoni (4), I. Dandouras (5), J. Scheer (6), P. Wurz (6), C. Austin (5), M. Bassas(5) ,F. Bertani(2), D. Brienza(3), F. Camozzi (7), S. Cibella (2), L. Colasanti (1), M. D’alessandro (2), M. Gerber (6), F. Lazzarotto (1), F. Mattioli (4), D. Maschietti (3), S. Massetti (1), J.-L. Medale (5), H. Mischler (6), D. Piazza (6), R. Rispoli (1), F. Tominetti (7), N. Vertolli (1), R. Wiesendanger (6).

(1) INAF-IAPS ,Roma, Italy , (2) ISC-CNR, ROME, Italy, (3) AMDL srl, ROME, Italy, (4) IFN-CNR, ROME, Italy, (5) IRAP, Toulouse, France, (6) University of Bern, Switzerland, (7) CGS, Milano, Italy.

Soft X-ray shuttering @43kHz

Ion beam_1keV shuttering @43kHz

ELENA is a Time-of-Flight (ToF) sensor, based on the state-of-the art of ultra-sonic oscillating shutter (operated at frequencies of the order of tens of kHz), mechanical gratings and Micro-Channel Plate (MCP) detectors. The purpose of the shuttering system

is to digitize space and time when tagging the incoming particles without introducing “disturbing” detec tor elements, which may affect the particle’s trajectory or the energy. This is particularly important in this case, in which neutrals of energies of a few tens of eVs must be detected.

Parameter Required ActualEnergy range <0.02 – 5 keV <0.01–5keV(mass dependent)Velocity resolution v/v 10% Down to 10% Viewing angle 5ox70o 4.5ox76o

Angular resolution 5ox5o 4.5ox4.5o (actual)4.5°x2.4° (nominal pixel)

Mass resolution M/M H and heavy species H and heavy speciesOptimal temporal resolution <5 m 40 sGeometric factor G 10–5 cm2 sr 3.5 10–5 cm2 sr Integral Geometric factor 1.1 10–3 cm2 sr

HEWG Meeting, Key Largo, May 14-17, 2013 3

Crucial ELENA elements

Crucial elements to reach the requested performances for TOF ELENA instrument are:

1. the Start element : Shutter System2. the Stop element : MCP detector (efficiency for low

energy particles)→ these two challenging items are the actual objects of our laboratory activity because they need to be tested

with particle beam

HEWG Meeting, Key Largo, May 14-17, 2013 4

ELENA MAIN BOARD StatusGreen –Power: Local 5V, 3,3V, 1,5V , Primary S/C 28V propagation to MIPA–MIPA DC/DC Outputs +12V, -12V and +5V–40 MHz Oscillator–Reset Circuitry–DSU communication / Test JIG connectivity–MEMORY: RAM–MEMORY: RAM and EEPROM accesses reading & writing–LOCAL H/K ADC (SPI Bus)–ELENA Driver Board I/F (Power, Gain Control, Osc Clock Setting)–SCU Communication IRQ Unit–TIMER Unit–Boot operated from Emulated 32k AMDL Prom–Partial operation S/W.Elena Main Open workoH/K ADC Levels tuning oELENA Proxy Board I/FoMIPA optocopler tuning.

HEWG Meeting, Key Largo, May 14-17, 2013

5

ELENA on the AIV CGS bench

HEWG Meeting, Key Largo, May 14-17, 2013 6

ELENA box

ELENA instrument

HEWG Meeting, Portovenere, June 12-16, 2011

7

External deflector

HEWG Meeting, Key Largo, May 14-17, 2013 8

The SHUTTER – Model FM-2

ELENA instrument

HEWG Meeting, Portovenere, June 12-16, 2011

9

Nanoslit resolution and status

10x10 mm2 patterned area

Si3N4 membrane -1um thick

SEM image of the ELENA shutter made of 10x10 mm2 area, 1µm thick Si3N4

membrane. a) front side view, b) back side view, c) enlarged view of a portion of the shutter d) at-glance comparison of the present (new) shutter design with the previous (old) one.

HEWG Meeting, Key Largo, May 14-17, 2013 10

ELENA Driver & Piggy Statuso Assembling to be finalized, Driver part readyo Driver Part Under Testing

HEWG Meeting, Key Largo, May 14-17, 2013 11

ELENA Driver FM

HEWG Meeting, Key Largo, May 14-17, 2013

12

ELENA shutter FM1 performances:test in conventional configuration

Test parametersBeam: • He+ beam• E= 1keV

Shutter FM1• Freq=39.06KHz• Pk-pk=10V• Offset= 1V

Driver system:• Sinusoidal signal from

conventional Frequency generator

Up: - Orange trace: sinusoidal inputDown: MCP ph signal of particles passing through the membranes during shutter perfomances

HEWG Meeting, Key Largo, May 14-17, 2013 13

ELENA shutter FM1 performances:Example of Zero crossing for TOF Start signal

Test parametersBeam: • He+ beam• E= 1keV

Shutter FM1• Freq=39.06KHz• Pk-pk=10V• Offset= to be

optimized

Driver system:• ELENA Breadboard

Up: - Orange trace: input frequency from Driver board - Yellow trace: digital encoded motion of the shutterDown: MCP signal of particles passing through the membranes during shutter perfomances

HEWG Meeting, Key Largo, May 14-17, 2013 14

ELENA shutter FM1 performances:test in ELENA BB configuration

Test parametersBeam: • He+ beam• E= 1keV

Shutter FM1• Freq=39.06KHz• Pk-pk=10V• Offset= 1V

Driver system:• ELENA BreadBoard

Up: -Yellow trace: oscillating input generated by Driver board -Orange trace: analogic encoded motion of the shutterDown: MCP signal of particles passing through the membranes during shutter perfomances

ELENA instrument

HEWG Meeting, Portovenere, June 12-16, 2011

15

Internal Deflector

ELENA instrument

HEWG Meeting, Portovenere, June 12-16, 2011

16

MCP CONFIGURATION

HEWG Meeting, Key Largo, May 14-17, 2013 17

ELENA Proxy Test Report

ELENA Proxy Statuso Assembling completedo Test in progress

HEWG Meeting, Key Largo, May 14-17, 2013 18

ELENA Proxy FM

HEWG Meeting, Key Largo, May 14-17, 2013 19

In summary…..

ELENA PFM is in advanced manufacturing phaseCrucial elements:

FPGA optimizationShutter membranes alignmentExternal/Internal deflector efficiencyScience data flowInstrument ful characterization (by ELENA BB)

ELENA & SERENA delivery: mid-September 2013