TTF Photocathodes Database

Photocathode # 13 .1 Datasheet

This is the 1st cathode on plug number 13.

The cathode is a Cs2Te film, prepared in date 23/11/1998 .

Physical Measurements

and of dark current measurements 

History of the plug before deposition

History of the plug operation performed until this cathode deposition (23/11/1998). 

 

History of the cathode during operation

The following operations are available.

Data for the cathode transfers

Cathode transfers from 23/11/1998 to 19/12/2003.

DateFromToShipmentBox
26/11/1998LASA DESY-HH-FLASH Go to2
16/11/1999DESY-HH-FLASH LASA Go to2

Available pictures for this cathode

The following photographs are available.

\\2klasa1\Catodi\TESLA\photo database\plug 13\13_1\dopo utilizzo\foto digitali\D1_Untitled_001.jpg
Digital photo.
Cathode side.
\\2klasa1\Catodi\TESLA\photo database\plug 13\13_1\dopo utilizzo\foto digitali\D1_Untitled_002.jpg
Digital photo.
Cathode side.
\\2klasa1\Catodi\TESLA\photo database\plug 13\13_1\dopo utilizzo\foto digitali\D2_Untitled_001.jpg
Digital photo of the coating surface.
Red mark on the right is the reference mark.
\\2klasa1\Catodi\TESLA\photo database\plug 13\13_1\dopo utilizzo\foto digitali\cat13.jpg
photo: digital
Cs2Te coated surface. This cathode back from DESY Hamburg and it was used in the gun
\\2klasa1\Catodi\TESLA\photo database\plug 13\13_1\dopo utilizzo\foto digitali\cat13a.jpg
Digital photo.
Cathode side.
\\2klasa1\Catodi\TESLA\photo database\plug 13\13_1\dopo utilizzo\foto digitali\cat13b.jpg
Digital photo.
Cathode side.
\\2klasa1\Catodi\TESLA\photo database\plug 13\13_1\dopo utilizzo\foto microscopio\cat13_200_top_8h_ci.jpg
Microscope photo: 200 x
Burn on the surface with material evaporation. 8h respect to the red mark
\\2klasa1\Catodi\TESLA\photo database\plug 13\13_1\dopo utilizzo\foto microscopio\cat13_200_top_6h_bf.jpg
Microscope photo: 200 x
Burn on the coating surface. 6h respect to the red mark.
\\2klasa1\Catodi\TESLA\photo database\plug 13\13_1\dopo utilizzo\foto microscopio\cat13_100_top_cen_bf.jpg
Microscope photo: 100 x
Holes and burns. Center of the cathode.
\\2klasa1\Catodi\TESLA\photo database\plug 13\13_1\dopo utilizzo\foto microscopio\cat13_100_top_9ha_df.jpg
Microscope photo: 100 x
Burnt coating border. 9h respect to the red mark.
\\2klasa1\Catodi\TESLA\photo database\plug 13\13_1\dopo utilizzo\foto microscopio\cat13_100_top_9h_df.jpg
Microscope photo: 100 x
Cu particle at 9h respect to the red mark. Particle is located 0.1mm below the surface
\\2klasa1\Catodi\TESLA\photo database\plug 13\13_1\dopo utilizzo\foto microscopio\cat13_100_top_8h_df.jpg
Microscope photo: 100 x
Coating border with localized burn. 8h respect to the red mark.
\\2klasa1\Catodi\TESLA\photo database\plug 13\13_1\dopo utilizzo\foto microscopio\cat13_100_top_7h_ci.jpg
Microscope photo: 100 x
Cut on the Mo polished surface close to the coating surface. 7h respect to the red mark.
\\2klasa1\Catodi\TESLA\photo database\plug 13\13_1\dopo utilizzo\foto microscopio\cat13_100_top_1h_df.jpg
Microscope photo: 100 x
Cu particle at 1h respect to the red mark
\\2klasa1\Catodi\TESLA\photo database\plug 13\13_1\dopo utilizzo\foto microscopio\cat13_100_top_12ha_df.jpg
Microscope photo: 100 x
Surface coating detail. 12h respect to the red mark.
\\2klasa1\Catodi\TESLA\photo database\plug 13\13_1\dopo utilizzo\foto microscopio\cat13_100_top_12h_ci.jpg
Microscope photo: 100 x
Burn on the Mo surface or something due to polishing procedure. 12h respect to the red mark.
\\2klasa1\Catodi\TESLA\photo database\plug 13\13_1\dopo utilizzo\foto microscopio\cat13_100_top_10hb_df.jpg
Microscope photo: 100 x
Cu particle at 10h respect to the red mark
\\2klasa1\Catodi\TESLA\photo database\plug 13\13_1\dopo utilizzo\foto microscopio\cat13_100_top_10ha_df.jpg
Microscope photo: 100 x
Cu particle at 10h respect to the red mark
\\2klasa1\Catodi\TESLA\photo database\plug 13\13_1\dopo utilizzo\foto microscopio\cat13_100_top_10h_df.jpg
Microscope photo: 100 x
Near to cathode border at 10h respect to the red mark
\\2klasa1\Catodi\TESLA\photo database\plug 13\13_1\dopo utilizzo\foto microscopio\cat13_100_side_d.jpg
Microscope photo: 100 x, dark field
Scratch due to the sliding of the plunger ball on cathode side.
\\2klasa1\Catodi\TESLA\photo database\plug 13\13_1\dopo utilizzo\foto microscopio\cat13_100_side_c.jpg
Microscope photo: 100 x, dark field
Scratch due to the sliding of the plunger ball on cathode side.
\\2klasa1\Catodi\TESLA\photo database\plug 13\13_1\dopo utilizzo\foto microscopio\cat13_100_side_b.jpg
Microscope photo: 100 x, dark field
Fine scratch with Cu particle on cathode side.
\\2klasa1\Catodi\TESLA\photo database\plug 13\13_1\dopo utilizzo\foto microscopio\cat13_100_side_a.jpg
Microscope photo: 100 x, bright field
Fine scratch with Cu particle on cathode side.
\\2klasa1\Catodi\TESLA\photo database\plug 13\13_1\dopo utilizzo\foto microscopio\cat13_200_top_9hb_df.jpg
Microscope photo: 200 x
Hole in the coating surface deep 12um with melted material on the bottom.
\\2klasa1\Catodi\TESLA\photo database\plug 13\13_1\dopo utilizzo\foto microscopio\cat13_200_top_10ha_df.jpg
Microscope photo: 200 x
Cu particle at 10h respect to the red mark

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Authored by Paolo Pierini, Daniele Sertore, and Laura Monaco LASA, 2002-2009.