davidkelliher.bsky.social
@davidkelliher.bsky.social
Accelerator Physicist
Looking for alternative Christmas music? XA2010 by Banjo or Freakout hits the spot banjoorfreakout.bandcamp.com/album/xa2010
XA2010, by Banjo or Freakout
10 track album
banjoorfreakout.bandcamp.com
December 8, 2025 at 11:49 AM
Amazing work by my 12 year old! Her hand drawn animation is an entry to Yeos creative fund competition. Please click through to instagram to like
Moonbeaaningly on Instagram: "GREEN FLAVOUR 🌿🍵 This is my entry for @yeoseurope ‘s contest!! It’s a digitally hand-drawn animation (9 frames per second) which took me about 40 hours to create, so I r...
110 likes, 16 comments - moonbeaaningly on November 19, 2025: "GREEN FLAVOUR 🌿🍵 This is my entry for @yeoseurope ‘s contest!! It’s a digitally hand-drawn animation (9 frames per second) which took me...
www.instagram.com
November 20, 2025 at 10:37 AM
A clock whos hands and dials cover vast timescales from seconds to epochs stephenbrooks.org/misc/clock.h...
SVG Clock
stephenbrooks.org
September 17, 2025 at 8:27 AM
Good to be back at @imperialcollegeldn.bsky.social for the FFA'25 workshop
September 16, 2025 at 2:23 PM
Day 2 at the IOP PAB conference taking place in Oxford today
July 10, 2025 at 8:52 AM
Xeuying Lu explained how reducing the RF pulse duration, tau, helps get around the breakdown limit - empirically the limit scales with tau to the power of 5
June 2, 2025 at 6:08 AM
Proton and heavy ion beam power over time presented by Kanemura-san of FRIB #ipac25
June 2, 2025 at 3:51 AM
SY Lee showed these nice experimental measurement of Lissajous curves #ipac25
June 2, 2025 at 3:44 AM
Papers submitted! #ipac25
May 28, 2025 at 3:20 PM
For accelerator physicists everywhere it's IPAC submission deadline day! #ipac25
May 28, 2025 at 7:17 AM
For accelerator physicists the black line depicts the microwave instability threshold in the complex normalised impedance plane in the case of a Gaussian momentum distribution. For plasma physicists - this is just another way of looking at the plasma dispersion function!
March 22, 2025 at 12:49 PM
Reposted
This is much worse than the quoted exchange conveys. Particularly Trump's response to Mills, "we are the federal law." Just absolute tyranny shit.
TRUMP: The NCAA has complied immediately. That's good. But I understand Maine -- is the governor of Maine here?

JANET MILLS: Yeah I'm here

TRUMP: Are you not gonna comply?

JM: I'm going to comply with state and federal law

T: You better do it bc you're not gonna get any federal funding at all
February 21, 2025 at 8:42 PM
Reposted
Ireland is set to apply for associate membership status of major European scientific body CERN today – but what is CERN, and why has it taken so long for us to join?
jrnl.ie/6626235
Black holes, particle physics and dark matter: What is CERN, and why is Ireland applying to join?
Ireland is set to apply for associate membership status of the major European scientific body today – but why has it taken so long?
jrnl.ie
February 19, 2025 at 8:27 AM
Reposted
Applications open for the summer 2025 session of the US Particle Accelerator School:
uspas.fnal.gov/programs/202...
USPAS | Programs | TBA University (2025)
Homepage for the summer 2025 USPAS session sponsored by TBA University
uspas.fnal.gov
February 3, 2025 at 8:31 PM
Just came upon a strange gfortran bug. ABS() which should return the absolute value somehow returned a negative value. It occurred when operating on a single array element
ABS(arr(i,j)).
The fix is to split steps
M = arr(i,j) followed by
ABS(M)

Anyone come across this?
February 3, 2025 at 2:08 PM
Harwell campus festures some eye-catching buildings at various stages of construction. This one looks fairly complete ...
January 31, 2025 at 5:20 PM
Beams circulating in a ring before extraction to one of target stations (in reality the split happens later along a common extraction line)
January 24, 2025 at 2:05 PM
Our beam stacking paper earned an Editor Suggestion accolade!
January 20, 2025 at 9:13 AM
Photo taken on Brighton beach yesterday by @fengho1.bsky.social
January 3, 2025 at 8:51 PM
Message to #GenX - check your blood pressure regularly!

I didn't and was diagnosed with hypertension a month ago after a few days of rapid heartbeat. Before that I was experiencing tinnitus which I failed to link to blood pressure.

I reckon lack of exercise over the course of a decade did for me.
December 31, 2024 at 12:58 PM
Does anyone know what's up with Ireland's bid to join @cern.bsky.social as an associate member? Its been over a year since Ireland applied
December 12, 2024 at 10:42 AM
Reposted
Cool 3 min video from Nature about why we should build a Muon collider (don’t take the cost number too seriously as it’s way too early still, but the sentiment is correct) ⚛️🧪 @muoncollider.bsky.social youtu.be/fT4mB3jl8jc?...
Why build a muon collider: a three minute guide
YouTube video by nature video
youtu.be
November 28, 2024 at 1:26 PM
I'm delighted to say our paper on beam stacking in FFAs has been accepted for publication
journals.aps.org/prab/accepte...
Physical Review Accelerators and Beams - Accepted Paper: Beam stacking experiment at a fixed field alternating gradient acceleratorsearch iconuser iconsearch iconuser iconuser iconopen iconclose icono...
journals.aps.org
December 9, 2024 at 1:03 PM
Liverpool, in 2029, will be the next European city after Deauville to host IPAC
December 7, 2024 at 10:57 PM
For accelerator physics, gotta be SY Lee
November 21, 2024 at 1:55 PM