Presentatie van workshop 'Onderzoekstages CERN' door Stan Bentvelsen (UvA, Nikhef) tijdens SIA-congres, 27 november 2014.

2. CERN
Probably one of the most
incredible experiments in the world!
Rende Steerenberg, CERN Switzerland
Beams Department, Operations Group

5. Technology at CERN
• Computing/IT
• Vacuum & cryogenics
• Cooling & Ventilation
• Electronics
• Electricity
• Magnets
• Mechanics
• Material Science
• Radiofrequency
• Control Systems
• Safety
• Civil Engineering
• …

6. Technical Students program
~ 200 positions/year
FIELDS : applied physics, engineering, computing
LENGTH : 4 to 12 months
ELIGIBILITY : 18 months of technical undergraduate
studies
FEATURES : a technical project with a CERN supervisor
a living allowance, incl. health insurance
“It’s a great place to start a career,
it’s a great place to learn new skills,
make new friends…”
Next application deadlines:
28 April 2015
30 October 2015

7. Technical Student Project Example
• Field: Electronics Engineering (Beam Instrumentation)
• Title: Development of a fast image readout system for
the PS Ionisation Profile monitor
• Description: A novel electron detection system has
been proposed for PS ionisation profile monitor, based
on a silicon pixel detector and Timepix3 chip. The speed
at which the system produces data requires an FPGA for
data collection, compression and retransmission via an
optical link. The subject of this project is the
development of FPGA code allowing such a readout and
test of the system with an electron source in vacuum.

8. A Beam Profile Measurement Technique

9. Why another technique ?
• A proton beam in the LHC contains a very small amount
of matter (<1 ng = one human cell) moving almost at
speed of light
• It carries energy of a TGV at full speed
• The transverse size is about 0.1 mm (like a hair)!
• How to measure the size of such object ?
• Any material object (e.g. wire) will be destroyed, hence
no beam intercepting devices can be used…

10. Ionisation Profile Monitor
Beam gas ionization profile monitors, measure the transverse beam
size by detecting the position of products of rest gas ionization.
Electrons produced are directed using electric and magnetic fields
towards a phosphor screen which is observed by a camera. An
image of the beam is registered and beam profile calculated
Concept: Magnet
Magnet

11. Some assignment information
• The described project forms a vital part of a bigger project.
• The student is employed for a period of 12 months
• The supervision of the project and the student is ensured by a CERN
staff member, highly specialised in beam profile measurements
• Deliverables:
• FPGA code
• Test setup to be constructed with electron source in vacuum
• Master degree report for University and CERN
• Opportunities for the student:
• Project presented at conference in USA (HB2014)
• Official publications in conference papers as main or co-author
• Participate in FPGA course, accelerator physics course, language courses,
etc. (paid by CERN)

12. Some quotes from a student
“I spent the last year of my master studies working as a technical student at CERN. Being a
mechanical engineer I had never worked with cryogenics before, nevertheless I was chosen to
work in the Cryolab – CERN Central Cryogenic Laboratory. It was an entirely new world for
me, but fortunately nobody expected me to know everything and I was given a chance to
learn.“
“I was operating a device called Dilution Refrigerator, which can reach the temperature of only
10 mK – just above the absolute zero. I was involved in the heat transfer analysis between the
Ultra Cold Electrodes used in the AEgIS project and the Mixing Chamber of the mentioned
Dilution Refrigerator. AEgIS – “Antimatter Experiment: Gravity Interferometry Spectroscopy” is
going to measure the influence of a gravitational field on anti-hydrogen using the cutting edge
technology. Exciting, isn’t it ?”
“The atmosphere of work at CERN is quite exceptional. It’s probably the most multicultural and
cosmopolitan place in the world. You can meet a lot of passionate people sharing the same
interests as you, learn their languages and get more familiar with their cultures.”
• Joanna, now PhD student at CERN

13. Mixing chamber Dilution Refrigerator

14. Some quotes from a student
“During this year I was working together with my colleagues on the AEgIS experiment. This
experiment needs large and very homogeneous magnetic fields in order to trap anti-protons
and help in the formation of an anti-hydrogen beam, ….“
“…. My work focused on the testing of the magnets at 4.2 K, but also their preparation before
the test. After the tests of the magnets we continued with the assembly of the final vacuum
vessels. This included the installation of the required instrumentation, leak-testing of the
vessels, and various other task of preparatory character. After the assembly the magnets were
cooled-down for the first time in their final position and first measurements with an anti-proton
beam have been performed…. ”
“During my work I enjoyed working in a multi-national environment with people from all over
Europe. And seeing an experiment build from the ground up. Starting with tests of small
components and seeing everything build together in the final experiment.”
• Tiemo, now PhD student at CERN

15. The Magnet The Magnet in the
AEgIS experiment

16. Technical Students program: ~ 200 positions/year
Admin Students program : ~ 30 positions/year
Doctoral Student program : ~ 60 positions/year
28 April 2015
30 October 2015
Next application deadlines:
Fellowship program : ~ 180 positions/year
19 May 2015
17 November 2015
Next application deadlines:
CERN Staff positions : ~ 180 positions/year
Any time of the year, check the web

17. Careers website
cern.ch/jobs

18. New Initiative
• CERN Ambassadors
• Create a network of CERN Ambassadors
among lectors in Universities and Engineering
schools
• Lectors & teacher participate in workshops with
targeted information sessions on CERN
technology and an overview of all related
vacancies
• First event tentatively March 2015 on
electronics
• More info: Michel Guye-Bergeret
michel.guye-bergeret@cern.ch

19. CERN Jobs Group is everywhere, follow us !

20. What do I get?
• Be at the forefront of technology and physics
• Collaborate with multicultural and multidisciplinary teams, without political or
religious barriers
• Follow experts in their technical domain
• Be part of a dynamic environment with training opportunities
• Make valuable and long-lasting contacts from all over Europe ( and world)
• Learn languages: CERN is a bi-lingual organization (English and French)
• Attractive remuneration package

21. …any questions?

22. Thanks!