[Lerftest] Waveguide review slides posted

[Jaroslaw Kowal]

Kevin, 

It sounds good. 
Please grab me after the meeting. 

Jerry 


From: "Kevin Jordan" <jordan at jlab.org> 
To: "Joseph Gubeli" <gubeli at jlab.org> 
Cc: "Jaroslaw Kowal" <jkowal at jlab.org>, "LCLS II @ LERF" <lerftest at jlab.org> 
Sent: Friday, October 13, 2017 8:12:30 PM 
Subject: Re: [Lerftest] Waveguide review slides posted 

HI Jerry, 
Let’s meet after the 8:00 meeting on Monday, we can go to the gallery and talk through the best path forward. 
Kevin 

Sent from my iPad 

On Oct 13, 2017, at 11:40 AM, Joseph Gubeli < gubeli at jlab.org > wrote: 




Hi Jerry, 



Safety did an assessment and said that 18” is OK. This will leave 50” in the 
aisle, they wanted a minimum of 48”. The SSA doors are easily removable with 
an 18” gap. Kevin can talk about the other questions you have. 



Cheers, Joe 



From: Lerftest [ mailto:lerftest-bounces at jlab.org ] On Behalf Of Jaroslaw 
Kowal 
Sent: Friday, October 13, 2017 11:21 AM 
To: Kevin Jordan < jordan at jlab.org > 
Cc: LCLS II @ LERF < lerftest at jlab.org > 
Subject: Re: [Lerftest] Waveguide review slides posted 



Kevin, 



I think by code you have to have 3 ft spacing. 

Also with 18" spacing behind some of the SSAs you will not be able to open 
the back door of SSA cabinet if access is need. These cabinets are 30" wide. 
Is that a concern? 



What I could do as an option is to install RF Interface chassis and 
contactors in the rack.This would eliminate the need for the access to the 
old racks. 

In this case I'd need a floor space for additional rack. 



A separate issue is power connections from PSS to SSAs. 

What is the planned location of the PSS panel (assuming we'll go with this 
solution)? 

What are the planned cable paths? 

Are you planning for cable trays etc.? 



We might be more effective discussing these issues in person. Please set up 
a meeting with interested parties if you think it's going to be 
better/faster way. 



Thank you, 

Jerry 



_____ 

From: "Kevin Jordan" < jordan at jlab.org < mailto:jordan at jlab.org > > 
To: "Jaroslaw Kowal" < jkowal at jlab.org < mailto:jkowal at jlab.org > > 
Cc: "LCLS II @ LERF" < lerftest at jlab.org < mailto:lerftest at jlab.org > > 
Sent: Wednesday, October 11, 2017 5:22:29 PM 
Subject: Re: [Lerftest] Waveguide review slides posted 



Jerry, 

Yes the tape is within an inch of final location, it looks to be 32”from the 
rack to the SSA, is that enough? 



Thanks 

Kevin 







Sent from my iPad 


On Oct 11, 2017, at 5:11 PM, Jaroslaw Kowal < jkowal at jlab.org 
< mailto:jkowal at jlab.org > > wrote: 

Kevin, 



I'd like to raise concern regarding the spacing behind the SSAs. 

The first rack to the left of HPA houses PSS RF Interface chassis and cross 
connects. Access to the front of this rack is required for PSS Certification 
and in case of maintenance. 

We'll have to check if there will be enough space to perform these duties. 

Could someone estimate the spacing from the back of the SSA to this rack? 
Can I depend on floor marking for this measurement? 



Thank you, 

Jerry 




_____ 


From: "Kevin Jordan" < jordan at jlab.org < mailto:jordan at jlab.org > > 
To: "LCLS II @ LERF" < lerftest at jlab.org < mailto:lerftest at jlab.org > > 
Sent: Wednesday, October 11, 2017 3:58:54 PM 
Subject: [Lerftest] Waveguide review slides posted 



The LCLS-II waveguide layout review was held this AM, the slides have been 
posted to the wiki: 

https://wiki.jlab.org/lerf/index.php/Reviews 

Comments and questions from the review will also be posted shortly. 

Kevin 
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