CERN: Consolidating LHC splices

Back in the fall of 2008, the Large Hadron Collider experienced a setback when a section of the liquid helium coolant exploded. Aside from the damage caused by the explosion, there was damage to the electrical system. The lack of coolant resulted in a loss of superconductivity, which caused the temperature of the conductors to rise to damaging levels — the conductors were still carrying thousands of amps of current, but their resistance had increased by several orders of magnitude. Ohm, the humanity!

To help prevent such an occurrence in the future, the LHC team has begun installing special shunts, which will help lower the resistance of the conductors at non-cryo temperatures, in order to prevent similar damage from happening again.

On 19 September 2008, during powering tests on the Large Hadron Collider (LHC), a fault occurred in a superconducting interconnection between two magnets – a dipole and a quadrupole – resulting in mechanical damage and release of helium from the magnet cold mass into the tunnel. Proper safety procedures were in force, the safety systems performed as expected, and no-one was put at risk. But the fault did delay work on the LHC by six months.

After the incident, CERN engineers decided that such interconnections should be upgraded to avoid similar electrical faults in future. As a precaution, beams in the LHC were accelerated below the LHC’s design limit for the first three years of running. Upgrading the interconnections will be one of the main activities at the LHC during its two-year shutdown, allowing the LHC to run at 7 TeV per beam when it starts up again.

There are 10,000 “splices” – superconducting connections between magnets – on the LHC. Each splice carries 13,000 amps.

In the video above, Jean-Phillipe Tock of the Technology department explains how, over the next 18 months, technicians will add an additional piece – a “shunt” – to each splice. The shunt is a low-resistance connection that forms an alternative path for a portion of the current in the event that the splice loses its superconducting state. A total of 27,000 shunts will be installed in the 27-kilometre accelerator.

[vid link]

Stop breadboarding and soldering – start making immediately! Adafruit’s Circuit Playground is jam-packed with LEDs, sensors, buttons, alligator clip pads and more. Build projects with Circuit Playground in a few minutes with the drag-and-drop MakeCode programming site, learn computer science using the CS Discoveries class on code.org, jump into CircuitPython to learn Python and hardware together, or even use Arduino IDE. Circuit Playground Express is the newest and best Circuit Playground board, with support for MakeCode, CircuitPython, and Arduino. It has a powerful processor, 10 NeoPixels, mini speaker, InfraRed receive and transmit, two buttons, a switch, 14 alligator clip pads, and lots of sensors: capacitive touch, IR proximity, temperature, light, motion and sound. A whole wide world of electronics and coding is waiting for you, and it fits in the palm of your hand.

Join 8,500+ makers on Adafruit’s Discord channels and be part of the community! http://adafru.it/discord

CircuitPython – Python on Microcontrollers is here!

Have an amazing project to share? Join the SHOW-AND-TELL every Wednesday night at 7:30pm ET on Google+ Hangouts.

Join us every Wednesday night at 8pm ET for Ask an Engineer!

Follow Adafruit on Instagram for top secret new products, behinds the scenes and more https://www.instagram.com/adafruit/

Maker Business — Rethink Robotics closes shop. Long live collaborative robots #makerbusiness

Wearables — Cleaning is key

Electronics — Serial overkill

Biohacking — Biohacking Resources – Books, Talks and Podcasts

Python for Microcontrollers — CircuitPython @ Hackaday SuperCon #ICYMI @circuitpython @micropython @ThePSF #Python

Get the only spam-free daily newsletter about wearables, running a "maker business", electronic tips and more! Subscribe at AdafruitDaily.com !

No Comments

No comments yet.

Sorry, the comment form is closed at this time.