The h Bar

user228700

12:01 AM

Ah, haha, nice!

user228700

(Y)

12:41 AM

@dmckee Assembled with a couple other grad students (that are vastly more experienced than me) a "1%" prototype of the "millicharge" particle detector. I didn't realize gain variances between PMTs were so high.

dmckee

OK, a silly question had me envisioning what has to be the silliest piece of NIM plug-boarding done in quite some time:

Now, you could DAC the data, smooth the output with an appropriately chosen analog filter, split the line, differentiate one half with an op-amp then perform an analog zero-crossing detection and use the output to latch the other signal (which has gone into an appropriate delay line) and finally ADC that to get your answer. I could even wire the analog part in NIM if I had a big enough cache of modules and couple of crates, but ... it would be silly. Really, quite silly. — dmckee ♦ 13 mins ago

@GPhys Yes, the gain matching step of any compound PMT-based detector is time consuming, picky, and very important.

0celóñe7

@JohnRennie need physics assistance

GPhys

our signal looks like single photoelectrons - test setup is going to be shipped to CERN with 12 cooled PMTs to be installed at an unused drainage tunnel near the CMS interaction point

I guess the idea is that after the setup is demonstrated working, then everybody involved can apply to fund the full experiment

dmckee

@GPhys Prototypes are great fun because they are small enough to understand in toto, quick enough to follow through all stages of the project, but real enough to be relevant.

You'll learn all kinds of stuff on that kind of project.

vzn

1:34 AM

Large Hadron Collider finds 'direct evidence' of light interacting with ITSELF in physics breakthrough that confirms long-standing prediction / dailymail

↑ space-waves! theyre called LIGHT! o_O

0celóñe7

@Secret that is an awful way to think about things

0celóñe7

2:22 AM

@rob I need someone worldly

@dmckee an experimental physicist could work

rob

@0celóñe7 I wasn't paying attention. Am I worldly?

0celóñe7

@rob paying attention to what?

you sound worldly

rob

@0celóñe7 What do you need?

0celóñe7

@rob I need to raise a monitor ~4"

what common items can I use to put it on

not books

rob

@0celóñe7 Bricks. They're cheap at hardware stores if you don't like the ones you find lying around outdoors.

0celóñe7

2:26 AM

@rob is there a brick getting place in Knoxville

near Vol Hall preferably

rob

@0celóñe7 Lowes/Home Depot

0celóñe7

@rob I can't see myself going there at 2230

rob

@0celóñe7 This has to be done now?

0celóñe7

@rob ideally, yes

I used books for the same purpose at home

rob

@0celóñe7 Use books that you're not planning to read before you go to the hardware store tomorrow.

0celóñe7

2:29 AM

but here I don't have books I want to prop up a monitor with

rob

Were you planning to read every book you own tonight?

0celóñe7

@rob no

rob

@0celóñe7 Problem temporarily solved

0celóñe7

@Slereah up early?

Slereah

Yep

0celóñe7

2:46 AM

@ACuriousMind I don't have access to the dining hall any more

@Slereah what are you up to

Slereah

Working on my vidyah gehm

the boring parts

User interface

0celóñe7

my books seem to have broken this shelf in my apartment

trying to avoid it completely collapsing

@Slereah do a better job than bethesda

Slereah

Gonna be hard

I'm no UI expert and I work alone

0celóñe7

3:08 AM

@Slereah Bethesda has no UI experts either

Slereah

Bethesda does that lazy thing where they use the same UI for both consoles and PC

Even though the UI is completely different

0celóñe7

@rob @BalarkaSen found a use for some topology books

Physics Meta

-1

Q: A new flag: "not-constructive"

Many a times, there are questions which are absolutely vague and have no meaning in them, like: If I fall from a great height, will I overcome the speed of light? Now, these are off topic questions, but there are no proper flags for this. Generally I flag this as very low quality, but many times...

Balarka Sen

3:47 AM

@0celóñe7 angry reacts only

0celóñe7

4:00 AM

@BalarkaSen name two books better suited to the task

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